/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:30:11,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:30:11,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:30:11,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:30:11,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 14:30:11,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:30:11,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:30:11,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:30:11,291 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:30:11,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:30:11,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:30:11,293 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:30:11,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:30:11,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:30:11,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:30:11,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:30:11,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:30:11,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:30:11,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:30:11,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:30:11,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:30:11,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:30:11,296 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:30:11,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:30:11,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:30:11,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:30:11,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:30:11,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:30:11,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:30:11,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:30:11,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:30:11,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:30:11,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:30:11,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:30:11,297 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:30:11,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:30:11,297 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:30:11,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:30:11,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:30:11,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:30:11,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:30:11,607 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:30:11,608 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:30:11,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl [2021-06-05 14:30:11,609 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl' [2021-06-05 14:30:11,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:30:11,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:30:11,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:30:11,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:30:11,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:30:11,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/1) ... [2021-06-05 14:30:11,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/1) ... [2021-06-05 14:30:11,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:30:11,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:30:11,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:30:11,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:30:11,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/1) ... [2021-06-05 14:30:11,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/1) ... [2021-06-05 14:30:11,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/1) ... [2021-06-05 14:30:11,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/1) ... [2021-06-05 14:30:11,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/1) ... [2021-06-05 14:30:11,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/1) ... [2021-06-05 14:30:11,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/1) ... [2021-06-05 14:30:11,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:30:11,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:30:11,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:30:11,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:30:11,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:30:11,773 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:30:11,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:30:11,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:30:11,774 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:30:11,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:30:11,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:30:11,774 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:30:11,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:30:11,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:30:11,775 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:30:11,776 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:30:11,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:30:11,777 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:30:12,293 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:30:12,294 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 14:30:12,297 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:30:12 BoogieIcfgContainer [2021-06-05 14:30:12,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:30:12,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:30:12,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:30:12,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:30:12,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:30:11" (1/2) ... [2021-06-05 14:30:12,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39779465 and model type name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:30:12, skipping insertion in model container [2021-06-05 14:30:12,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:30:12" (2/2) ... [2021-06-05 14:30:12,303 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-subst.wvr.bpl [2021-06-05 14:30:12,307 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:30:12,307 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:30:12,307 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:30:12,308 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:30:12,335 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 14:30:12,351 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 14:30:12,367 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:30:12,368 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:30:12,368 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:30:12,368 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:30:12,368 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:30:12,368 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:30:12,368 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:30:12,368 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:30:12,375 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-06-05 14:30:12,389 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:12,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:12,399 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:12,399 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:12,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-06-05 14:30:12,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:12,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736574002] [2021-06-05 14:30:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:12,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:12,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736574002] [2021-06-05 14:30:12,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736574002] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:12,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:12,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:12,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622052413] [2021-06-05 14:30:12,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:12,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:12,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:12,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:12,734 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:13,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:13,156 INFO L93 Difference]: Finished difference Result 399 states and 1111 transitions. [2021-06-05 14:30:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:13,178 INFO L225 Difference]: With dead ends: 399 [2021-06-05 14:30:13,178 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 14:30:13,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:13,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 14:30:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 147. [2021-06-05 14:30:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.863013698630137) internal successors, (418), 146 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 418 transitions. [2021-06-05 14:30:13,252 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 418 transitions. Word has length 17 [2021-06-05 14:30:13,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:13,253 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 418 transitions. [2021-06-05 14:30:13,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:13,253 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 418 transitions. [2021-06-05 14:30:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:13,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:13,257 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:13,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:30:13,257 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash 540971640, now seen corresponding path program 2 times [2021-06-05 14:30:13,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:13,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113761127] [2021-06-05 14:30:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:13,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:13,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113761127] [2021-06-05 14:30:13,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113761127] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:13,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:13,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:13,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81330899] [2021-06-05 14:30:13,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:13,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:13,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:13,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:13,409 INFO L87 Difference]: Start difference. First operand 147 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:13,737 INFO L93 Difference]: Finished difference Result 375 states and 1007 transitions. [2021-06-05 14:30:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:13,740 INFO L225 Difference]: With dead ends: 375 [2021-06-05 14:30:13,741 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 14:30:13,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 14:30:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 171. [2021-06-05 14:30:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.864705882352941) internal successors, (487), 170 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 487 transitions. [2021-06-05 14:30:13,752 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 487 transitions. Word has length 17 [2021-06-05 14:30:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:13,752 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 487 transitions. [2021-06-05 14:30:13,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 487 transitions. [2021-06-05 14:30:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:13,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:13,754 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:13,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:30:13,755 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:13,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:13,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1605199120, now seen corresponding path program 3 times [2021-06-05 14:30:13,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:13,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249593295] [2021-06-05 14:30:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:13,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:13,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249593295] [2021-06-05 14:30:13,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249593295] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:13,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:13,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237331513] [2021-06-05 14:30:13,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:13,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:13,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:13,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:13,879 INFO L87 Difference]: Start difference. First operand 171 states and 487 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:14,147 INFO L93 Difference]: Finished difference Result 358 states and 984 transitions. [2021-06-05 14:30:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:14,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:14,151 INFO L225 Difference]: With dead ends: 358 [2021-06-05 14:30:14,151 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 14:30:14,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 14:30:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 180. [2021-06-05 14:30:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.8547486033519553) internal successors, (511), 179 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 511 transitions. [2021-06-05 14:30:14,166 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 511 transitions. Word has length 17 [2021-06-05 14:30:14,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:14,167 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 511 transitions. [2021-06-05 14:30:14,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 511 transitions. [2021-06-05 14:30:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:14,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:14,168 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:14,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:30:14,168 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1741639554, now seen corresponding path program 4 times [2021-06-05 14:30:14,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:14,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415299354] [2021-06-05 14:30:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:14,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:14,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415299354] [2021-06-05 14:30:14,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415299354] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:14,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:14,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:14,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279147072] [2021-06-05 14:30:14,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:14,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:14,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:14,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:14,295 INFO L87 Difference]: Start difference. First operand 180 states and 511 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:14,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:14,593 INFO L93 Difference]: Finished difference Result 510 states and 1384 transitions. [2021-06-05 14:30:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:14,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:14,597 INFO L225 Difference]: With dead ends: 510 [2021-06-05 14:30:14,597 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 14:30:14,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:14,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 14:30:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 196. [2021-06-05 14:30:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.958974358974359) internal successors, (577), 195 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 577 transitions. [2021-06-05 14:30:14,608 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 577 transitions. Word has length 17 [2021-06-05 14:30:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:14,609 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 577 transitions. [2021-06-05 14:30:14,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 577 transitions. [2021-06-05 14:30:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:14,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:14,610 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:14,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:30:14,610 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:14,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1174687474, now seen corresponding path program 5 times [2021-06-05 14:30:14,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:14,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824784925] [2021-06-05 14:30:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:14,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:14,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824784925] [2021-06-05 14:30:14,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824784925] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:14,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:14,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:14,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822273967] [2021-06-05 14:30:14,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:14,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:14,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:14,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:14,798 INFO L87 Difference]: Start difference. First operand 196 states and 577 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:15,060 INFO L93 Difference]: Finished difference Result 464 states and 1270 transitions. [2021-06-05 14:30:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:15,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:15,063 INFO L225 Difference]: With dead ends: 464 [2021-06-05 14:30:15,063 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 14:30:15,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 14:30:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 196. [2021-06-05 14:30:15,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.943589743589744) internal successors, (574), 195 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 574 transitions. [2021-06-05 14:30:15,073 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 574 transitions. Word has length 17 [2021-06-05 14:30:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:15,073 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 574 transitions. [2021-06-05 14:30:15,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 574 transitions. [2021-06-05 14:30:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:15,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:15,074 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:15,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:30:15,074 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1412132048, now seen corresponding path program 6 times [2021-06-05 14:30:15,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:15,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908925933] [2021-06-05 14:30:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:15,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:15,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908925933] [2021-06-05 14:30:15,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908925933] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:15,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:15,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:15,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273890453] [2021-06-05 14:30:15,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:15,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:15,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:15,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:15,211 INFO L87 Difference]: Start difference. First operand 196 states and 574 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:15,516 INFO L93 Difference]: Finished difference Result 497 states and 1376 transitions. [2021-06-05 14:30:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:15,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:15,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:15,520 INFO L225 Difference]: With dead ends: 497 [2021-06-05 14:30:15,520 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 14:30:15,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 14:30:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 202. [2021-06-05 14:30:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 3.0) internal successors, (603), 201 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 603 transitions. [2021-06-05 14:30:15,529 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 603 transitions. Word has length 17 [2021-06-05 14:30:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:15,530 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 603 transitions. [2021-06-05 14:30:15,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 603 transitions. [2021-06-05 14:30:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:15,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:15,531 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:15,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:30:15,531 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash -845179968, now seen corresponding path program 7 times [2021-06-05 14:30:15,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:15,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352439276] [2021-06-05 14:30:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:15,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:15,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352439276] [2021-06-05 14:30:15,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352439276] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:15,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:15,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:15,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448197823] [2021-06-05 14:30:15,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:15,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:15,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:15,640 INFO L87 Difference]: Start difference. First operand 202 states and 603 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:15,942 INFO L93 Difference]: Finished difference Result 490 states and 1348 transitions. [2021-06-05 14:30:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:15,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:15,946 INFO L225 Difference]: With dead ends: 490 [2021-06-05 14:30:15,946 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 14:30:15,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 14:30:15,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 199. [2021-06-05 14:30:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.974747474747475) internal successors, (589), 198 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 589 transitions. [2021-06-05 14:30:15,955 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 589 transitions. Word has length 17 [2021-06-05 14:30:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:15,956 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 589 transitions. [2021-06-05 14:30:15,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 589 transitions. [2021-06-05 14:30:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:15,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:15,957 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:15,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:30:15,957 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:15,958 INFO L82 PathProgramCache]: Analyzing trace with hash -119789648, now seen corresponding path program 8 times [2021-06-05 14:30:15,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:15,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644918996] [2021-06-05 14:30:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:16,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:16,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644918996] [2021-06-05 14:30:16,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644918996] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:16,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:16,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:16,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785870681] [2021-06-05 14:30:16,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:16,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:16,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:16,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:16,070 INFO L87 Difference]: Start difference. First operand 199 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:16,279 INFO L93 Difference]: Finished difference Result 466 states and 1291 transitions. [2021-06-05 14:30:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:30:16,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:16,282 INFO L225 Difference]: With dead ends: 466 [2021-06-05 14:30:16,282 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 14:30:16,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 14:30:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 202. [2021-06-05 14:30:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.9950248756218905) internal successors, (602), 201 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 602 transitions. [2021-06-05 14:30:16,290 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 602 transitions. Word has length 17 [2021-06-05 14:30:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:16,290 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 602 transitions. [2021-06-05 14:30:16,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 602 transitions. [2021-06-05 14:30:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:16,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:16,291 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:16,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 14:30:16,291 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:16,292 INFO L82 PathProgramCache]: Analyzing trace with hash -494987088, now seen corresponding path program 9 times [2021-06-05 14:30:16,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:16,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680220275] [2021-06-05 14:30:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:16,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:16,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680220275] [2021-06-05 14:30:16,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680220275] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:16,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:16,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:16,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509577742] [2021-06-05 14:30:16,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:16,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:16,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:16,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:16,383 INFO L87 Difference]: Start difference. First operand 202 states and 602 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:16,641 INFO L93 Difference]: Finished difference Result 460 states and 1287 transitions. [2021-06-05 14:30:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:16,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:16,644 INFO L225 Difference]: With dead ends: 460 [2021-06-05 14:30:16,644 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:30:16,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:30:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 208. [2021-06-05 14:30:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9806763285024154) internal successors, (617), 207 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 617 transitions. [2021-06-05 14:30:16,651 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 617 transitions. Word has length 17 [2021-06-05 14:30:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:16,652 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 617 transitions. [2021-06-05 14:30:16,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 617 transitions. [2021-06-05 14:30:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:16,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:16,653 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:16,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 14:30:16,653 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 19598974, now seen corresponding path program 10 times [2021-06-05 14:30:16,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:16,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139483869] [2021-06-05 14:30:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:16,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:16,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139483869] [2021-06-05 14:30:16,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139483869] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:16,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:16,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:16,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709264073] [2021-06-05 14:30:16,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:16,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:16,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:16,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:16,757 INFO L87 Difference]: Start difference. First operand 208 states and 617 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:17,032 INFO L93 Difference]: Finished difference Result 493 states and 1376 transitions. [2021-06-05 14:30:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:17,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:17,035 INFO L225 Difference]: With dead ends: 493 [2021-06-05 14:30:17,035 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 14:30:17,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 14:30:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 215. [2021-06-05 14:30:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-06-05 14:30:17,044 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 17 [2021-06-05 14:30:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:17,044 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-06-05 14:30:17,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-06-05 14:30:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:17,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:17,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:17,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 14:30:17,045 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash 586551054, now seen corresponding path program 11 times [2021-06-05 14:30:17,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:17,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195857226] [2021-06-05 14:30:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:17,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195857226] [2021-06-05 14:30:17,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195857226] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:17,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:17,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:17,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199107235] [2021-06-05 14:30:17,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:17,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:17,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:17,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:17,142 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:17,405 INFO L93 Difference]: Finished difference Result 493 states and 1363 transitions. [2021-06-05 14:30:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:17,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:17,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:17,408 INFO L225 Difference]: With dead ends: 493 [2021-06-05 14:30:17,408 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 14:30:17,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 14:30:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 212. [2021-06-05 14:30:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.0) internal successors, (633), 211 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 633 transitions. [2021-06-05 14:30:17,417 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 633 transitions. Word has length 17 [2021-06-05 14:30:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:17,417 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 633 transitions. [2021-06-05 14:30:17,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 633 transitions. [2021-06-05 14:30:17,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:17,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:17,418 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:17,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 14:30:17,418 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:17,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:17,419 INFO L82 PathProgramCache]: Analyzing trace with hash 15096248, now seen corresponding path program 12 times [2021-06-05 14:30:17,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:17,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528798779] [2021-06-05 14:30:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:17,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528798779] [2021-06-05 14:30:17,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528798779] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:17,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:17,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:17,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000611352] [2021-06-05 14:30:17,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:17,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:17,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:17,508 INFO L87 Difference]: Start difference. First operand 212 states and 633 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:17,713 INFO L93 Difference]: Finished difference Result 489 states and 1347 transitions. [2021-06-05 14:30:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:17,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:17,716 INFO L225 Difference]: With dead ends: 489 [2021-06-05 14:30:17,716 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 14:30:17,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 14:30:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 212. [2021-06-05 14:30:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.985781990521327) internal successors, (630), 211 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 630 transitions. [2021-06-05 14:30:17,729 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 630 transitions. Word has length 17 [2021-06-05 14:30:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:17,729 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 630 transitions. [2021-06-05 14:30:17,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 630 transitions. [2021-06-05 14:30:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:17,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:17,730 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:17,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 14:30:17,730 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:17,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1192892344, now seen corresponding path program 13 times [2021-06-05 14:30:17,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:17,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767613685] [2021-06-05 14:30:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:17,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:17,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767613685] [2021-06-05 14:30:17,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767613685] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:17,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:17,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:17,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605534347] [2021-06-05 14:30:17,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:17,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:17,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:17,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:17,866 INFO L87 Difference]: Start difference. First operand 212 states and 630 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:18,135 INFO L93 Difference]: Finished difference Result 498 states and 1397 transitions. [2021-06-05 14:30:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:18,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:18,138 INFO L225 Difference]: With dead ends: 498 [2021-06-05 14:30:18,138 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 14:30:18,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 14:30:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 218. [2021-06-05 14:30:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.0276497695852536) internal successors, (657), 217 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 657 transitions. [2021-06-05 14:30:18,147 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 657 transitions. Word has length 17 [2021-06-05 14:30:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:18,147 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 657 transitions. [2021-06-05 14:30:18,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 657 transitions. [2021-06-05 14:30:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:18,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:18,148 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:18,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 14:30:18,148 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1477737184, now seen corresponding path program 14 times [2021-06-05 14:30:18,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:18,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611074979] [2021-06-05 14:30:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:18,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:18,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611074979] [2021-06-05 14:30:18,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611074979] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:18,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:18,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:18,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950515892] [2021-06-05 14:30:18,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:18,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:18,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:18,241 INFO L87 Difference]: Start difference. First operand 218 states and 657 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:18,464 INFO L93 Difference]: Finished difference Result 465 states and 1316 transitions. [2021-06-05 14:30:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:18,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:18,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:18,467 INFO L225 Difference]: With dead ends: 465 [2021-06-05 14:30:18,467 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 14:30:18,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:18,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 14:30:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 220. [2021-06-05 14:30:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 3.0319634703196345) internal successors, (664), 219 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 664 transitions. [2021-06-05 14:30:18,475 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 664 transitions. Word has length 17 [2021-06-05 14:30:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:18,475 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 664 transitions. [2021-06-05 14:30:18,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 664 transitions. [2021-06-05 14:30:18,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:18,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:18,476 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:18,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 14:30:18,476 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:18,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:18,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2013826360, now seen corresponding path program 15 times [2021-06-05 14:30:18,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:18,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033231115] [2021-06-05 14:30:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:18,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:18,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033231115] [2021-06-05 14:30:18,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033231115] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:18,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:18,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:18,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850609420] [2021-06-05 14:30:18,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:18,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:18,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:18,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:18,558 INFO L87 Difference]: Start difference. First operand 220 states and 664 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:18,784 INFO L93 Difference]: Finished difference Result 463 states and 1301 transitions. [2021-06-05 14:30:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:18,787 INFO L225 Difference]: With dead ends: 463 [2021-06-05 14:30:18,787 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 14:30:18,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 14:30:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 222. [2021-06-05 14:30:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.0271493212669682) internal successors, (669), 221 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 669 transitions. [2021-06-05 14:30:18,794 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 669 transitions. Word has length 17 [2021-06-05 14:30:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:18,795 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 669 transitions. [2021-06-05 14:30:18,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 669 transitions. [2021-06-05 14:30:18,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:18,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:18,796 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:18,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 14:30:18,796 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1567844280, now seen corresponding path program 16 times [2021-06-05 14:30:18,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:18,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870595846] [2021-06-05 14:30:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:18,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:18,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870595846] [2021-06-05 14:30:18,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870595846] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:18,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:18,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:18,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065520107] [2021-06-05 14:30:18,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:18,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:18,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:18,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:18,886 INFO L87 Difference]: Start difference. First operand 222 states and 669 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:19,146 INFO L93 Difference]: Finished difference Result 440 states and 1234 transitions. [2021-06-05 14:30:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:19,148 INFO L225 Difference]: With dead ends: 440 [2021-06-05 14:30:19,148 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 14:30:19,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 14:30:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 224. [2021-06-05 14:30:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.0448430493273544) internal successors, (679), 223 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 679 transitions. [2021-06-05 14:30:19,156 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 679 transitions. Word has length 17 [2021-06-05 14:30:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:19,156 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 679 transitions. [2021-06-05 14:30:19,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 679 transitions. [2021-06-05 14:30:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:19,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:19,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:19,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 14:30:19,157 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1897351786, now seen corresponding path program 17 times [2021-06-05 14:30:19,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:19,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605469390] [2021-06-05 14:30:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:19,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:19,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605469390] [2021-06-05 14:30:19,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605469390] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:19,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:19,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:19,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563683264] [2021-06-05 14:30:19,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:19,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:19,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:19,263 INFO L87 Difference]: Start difference. First operand 224 states and 679 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:19,555 INFO L93 Difference]: Finished difference Result 491 states and 1364 transitions. [2021-06-05 14:30:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:19,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:19,558 INFO L225 Difference]: With dead ends: 491 [2021-06-05 14:30:19,558 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 14:30:19,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 14:30:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 227. [2021-06-05 14:30:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 3.0707964601769913) internal successors, (694), 226 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 694 transitions. [2021-06-05 14:30:19,566 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 694 transitions. Word has length 17 [2021-06-05 14:30:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:19,566 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 694 transitions. [2021-06-05 14:30:19,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 694 transitions. [2021-06-05 14:30:19,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:19,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:19,567 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:19,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 14:30:19,568 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:19,568 INFO L82 PathProgramCache]: Analyzing trace with hash -773277742, now seen corresponding path program 18 times [2021-06-05 14:30:19,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:19,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155861560] [2021-06-05 14:30:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:19,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:19,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155861560] [2021-06-05 14:30:19,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155861560] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:19,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:19,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:30:19,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060096989] [2021-06-05 14:30:19,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:30:19,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:19,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:30:19,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:19,637 INFO L87 Difference]: Start difference. First operand 227 states and 694 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:19,753 INFO L93 Difference]: Finished difference Result 417 states and 1196 transitions. [2021-06-05 14:30:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:30:19,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:19,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:19,755 INFO L225 Difference]: With dead ends: 417 [2021-06-05 14:30:19,755 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 14:30:19,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 14:30:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 231. [2021-06-05 14:30:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.121739130434783) internal successors, (718), 230 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 718 transitions. [2021-06-05 14:30:19,771 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 718 transitions. Word has length 17 [2021-06-05 14:30:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:19,771 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 718 transitions. [2021-06-05 14:30:19,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 718 transitions. [2021-06-05 14:30:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:19,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:19,772 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:19,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 14:30:19,772 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1982261886, now seen corresponding path program 19 times [2021-06-05 14:30:19,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:19,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82123556] [2021-06-05 14:30:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:19,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:19,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82123556] [2021-06-05 14:30:19,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82123556] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:19,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:19,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:30:19,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896673639] [2021-06-05 14:30:19,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:30:19,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:19,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:30:19,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:19,846 INFO L87 Difference]: Start difference. First operand 231 states and 718 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:19,960 INFO L93 Difference]: Finished difference Result 372 states and 1090 transitions. [2021-06-05 14:30:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:30:19,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:19,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:19,964 INFO L225 Difference]: With dead ends: 372 [2021-06-05 14:30:19,964 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 14:30:19,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 14:30:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 237. [2021-06-05 14:30:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 3.114406779661017) internal successors, (735), 236 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 735 transitions. [2021-06-05 14:30:19,972 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 735 transitions. Word has length 17 [2021-06-05 14:30:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:19,973 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 735 transitions. [2021-06-05 14:30:19,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 735 transitions. [2021-06-05 14:30:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:19,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:19,974 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:19,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 14:30:19,974 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:19,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1814506960, now seen corresponding path program 20 times [2021-06-05 14:30:19,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:19,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217113425] [2021-06-05 14:30:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:20,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:20,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217113425] [2021-06-05 14:30:20,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217113425] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:20,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:20,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:20,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664124509] [2021-06-05 14:30:20,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:20,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:20,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:20,088 INFO L87 Difference]: Start difference. First operand 237 states and 735 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:20,365 INFO L93 Difference]: Finished difference Result 459 states and 1341 transitions. [2021-06-05 14:30:20,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:20,368 INFO L225 Difference]: With dead ends: 459 [2021-06-05 14:30:20,368 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 14:30:20,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 14:30:20,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 245. [2021-06-05 14:30:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.151639344262295) internal successors, (769), 244 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 769 transitions. [2021-06-05 14:30:20,376 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 769 transitions. Word has length 17 [2021-06-05 14:30:20,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:20,376 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 769 transitions. [2021-06-05 14:30:20,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,376 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 769 transitions. [2021-06-05 14:30:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:20,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:20,377 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:20,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 14:30:20,377 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:20,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1247554880, now seen corresponding path program 21 times [2021-06-05 14:30:20,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:20,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62477968] [2021-06-05 14:30:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:20,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:20,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62477968] [2021-06-05 14:30:20,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62477968] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:20,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:20,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:20,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374009149] [2021-06-05 14:30:20,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:20,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:20,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:20,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:20,501 INFO L87 Difference]: Start difference. First operand 245 states and 769 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:20,787 INFO L93 Difference]: Finished difference Result 459 states and 1328 transitions. [2021-06-05 14:30:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:20,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:20,790 INFO L225 Difference]: With dead ends: 459 [2021-06-05 14:30:20,790 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 14:30:20,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 14:30:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 242. [2021-06-05 14:30:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.132780082987552) internal successors, (755), 241 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 755 transitions. [2021-06-05 14:30:20,801 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 755 transitions. Word has length 17 [2021-06-05 14:30:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:20,801 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 755 transitions. [2021-06-05 14:30:20,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 755 transitions. [2021-06-05 14:30:20,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:20,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:20,803 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:20,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 14:30:20,803 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:20,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1819009686, now seen corresponding path program 22 times [2021-06-05 14:30:20,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:20,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991697049] [2021-06-05 14:30:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:20,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:20,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991697049] [2021-06-05 14:30:20,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991697049] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:20,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:20,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:20,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679238340] [2021-06-05 14:30:20,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:20,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:20,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:20,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:20,919 INFO L87 Difference]: Start difference. First operand 242 states and 755 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:21,142 INFO L93 Difference]: Finished difference Result 464 states and 1336 transitions. [2021-06-05 14:30:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:21,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:21,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:21,144 INFO L225 Difference]: With dead ends: 464 [2021-06-05 14:30:21,144 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 14:30:21,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 14:30:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 239. [2021-06-05 14:30:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 3.1260504201680672) internal successors, (744), 238 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 744 transitions. [2021-06-05 14:30:21,151 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 744 transitions. Word has length 17 [2021-06-05 14:30:21,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:21,151 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 744 transitions. [2021-06-05 14:30:21,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 744 transitions. [2021-06-05 14:30:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:21,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:21,152 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:21,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 14:30:21,152 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash -641213590, now seen corresponding path program 23 times [2021-06-05 14:30:21,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:21,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907857639] [2021-06-05 14:30:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:21,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:21,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907857639] [2021-06-05 14:30:21,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907857639] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:21,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:21,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:21,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126491449] [2021-06-05 14:30:21,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:21,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:21,275 INFO L87 Difference]: Start difference. First operand 239 states and 744 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:21,605 INFO L93 Difference]: Finished difference Result 501 states and 1445 transitions. [2021-06-05 14:30:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:21,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:21,608 INFO L225 Difference]: With dead ends: 501 [2021-06-05 14:30:21,608 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 14:30:21,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 316.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 14:30:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 245. [2021-06-05 14:30:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.168032786885246) internal successors, (773), 244 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 773 transitions. [2021-06-05 14:30:21,616 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 773 transitions. Word has length 17 [2021-06-05 14:30:21,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:21,616 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 773 transitions. [2021-06-05 14:30:21,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:21,616 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 773 transitions. [2021-06-05 14:30:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:21,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:21,617 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:21,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 14:30:21,617 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash -74261510, now seen corresponding path program 24 times [2021-06-05 14:30:21,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:21,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982202538] [2021-06-05 14:30:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:21,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:21,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982202538] [2021-06-05 14:30:21,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982202538] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:21,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:21,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:21,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759591006] [2021-06-05 14:30:21,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:21,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:21,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:21,727 INFO L87 Difference]: Start difference. First operand 245 states and 773 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:22,048 INFO L93 Difference]: Finished difference Result 501 states and 1432 transitions. [2021-06-05 14:30:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:22,050 INFO L225 Difference]: With dead ends: 501 [2021-06-05 14:30:22,050 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 14:30:22,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 14:30:22,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 242. [2021-06-05 14:30:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.1493775933609958) internal successors, (759), 241 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 759 transitions. [2021-06-05 14:30:22,057 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 759 transitions. Word has length 17 [2021-06-05 14:30:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:22,058 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 759 transitions. [2021-06-05 14:30:22,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 759 transitions. [2021-06-05 14:30:22,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:22,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:22,059 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:22,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 14:30:22,059 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:22,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:22,059 INFO L82 PathProgramCache]: Analyzing trace with hash 651128810, now seen corresponding path program 25 times [2021-06-05 14:30:22,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:22,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658932505] [2021-06-05 14:30:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:22,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:22,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658932505] [2021-06-05 14:30:22,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658932505] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:22,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:22,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:22,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703490001] [2021-06-05 14:30:22,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:22,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:22,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:22,145 INFO L87 Difference]: Start difference. First operand 242 states and 759 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:22,344 INFO L93 Difference]: Finished difference Result 491 states and 1419 transitions. [2021-06-05 14:30:22,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:30:22,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:22,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:22,346 INFO L225 Difference]: With dead ends: 491 [2021-06-05 14:30:22,346 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 14:30:22,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:22,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 14:30:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 245. [2021-06-05 14:30:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.1639344262295084) internal successors, (772), 244 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 772 transitions. [2021-06-05 14:30:22,354 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 772 transitions. Word has length 17 [2021-06-05 14:30:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:22,354 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 772 transitions. [2021-06-05 14:30:22,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 772 transitions. [2021-06-05 14:30:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:22,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:22,355 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:22,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 14:30:22,355 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:22,355 INFO L82 PathProgramCache]: Analyzing trace with hash 275931370, now seen corresponding path program 26 times [2021-06-05 14:30:22,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:22,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091950533] [2021-06-05 14:30:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:22,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:22,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091950533] [2021-06-05 14:30:22,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091950533] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:22,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:22,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692713898] [2021-06-05 14:30:22,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:22,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:22,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:22,461 INFO L87 Difference]: Start difference. First operand 245 states and 772 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:22,768 INFO L93 Difference]: Finished difference Result 477 states and 1392 transitions. [2021-06-05 14:30:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:22,771 INFO L225 Difference]: With dead ends: 477 [2021-06-05 14:30:22,771 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:30:22,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:30:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 242. [2021-06-05 14:30:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.141078838174274) internal successors, (757), 241 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 757 transitions. [2021-06-05 14:30:22,779 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 757 transitions. Word has length 17 [2021-06-05 14:30:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:22,779 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 757 transitions. [2021-06-05 14:30:22,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 757 transitions. [2021-06-05 14:30:22,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:22,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:22,780 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:22,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 14:30:22,780 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:22,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:22,780 INFO L82 PathProgramCache]: Analyzing trace with hash 447035002, now seen corresponding path program 27 times [2021-06-05 14:30:22,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:22,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842573140] [2021-06-05 14:30:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:22,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:22,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842573140] [2021-06-05 14:30:22,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842573140] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:22,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:22,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:22,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560445068] [2021-06-05 14:30:22,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:22,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:22,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:22,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:22,878 INFO L87 Difference]: Start difference. First operand 242 states and 757 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:23,103 INFO L93 Difference]: Finished difference Result 515 states and 1469 transitions. [2021-06-05 14:30:23,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:23,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:23,105 INFO L225 Difference]: With dead ends: 515 [2021-06-05 14:30:23,105 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 14:30:23,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:23,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 14:30:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 244. [2021-06-05 14:30:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.1358024691358026) internal successors, (762), 243 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 762 transitions. [2021-06-05 14:30:23,112 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 762 transitions. Word has length 17 [2021-06-05 14:30:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:23,112 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 762 transitions. [2021-06-05 14:30:23,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 762 transitions. [2021-06-05 14:30:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:23,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:23,113 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:23,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 14:30:23,113 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:23,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1316167168, now seen corresponding path program 28 times [2021-06-05 14:30:23,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:23,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061879909] [2021-06-05 14:30:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:23,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:23,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061879909] [2021-06-05 14:30:23,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061879909] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:23,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:23,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:23,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36552146] [2021-06-05 14:30:23,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:23,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:23,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:23,224 INFO L87 Difference]: Start difference. First operand 244 states and 762 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:23,466 INFO L93 Difference]: Finished difference Result 486 states and 1417 transitions. [2021-06-05 14:30:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:23,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:23,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:23,468 INFO L225 Difference]: With dead ends: 486 [2021-06-05 14:30:23,468 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 14:30:23,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 14:30:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 244. [2021-06-05 14:30:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.1358024691358026) internal successors, (762), 243 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 762 transitions. [2021-06-05 14:30:23,474 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 762 transitions. Word has length 17 [2021-06-05 14:30:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:23,475 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 762 transitions. [2021-06-05 14:30:23,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 762 transitions. [2021-06-05 14:30:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:23,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:23,475 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:23,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-05 14:30:23,476 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:23,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1963810802, now seen corresponding path program 29 times [2021-06-05 14:30:23,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:23,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230285525] [2021-06-05 14:30:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:23,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:23,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230285525] [2021-06-05 14:30:23,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230285525] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:23,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:23,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:23,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373441145] [2021-06-05 14:30:23,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:23,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:23,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:23,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:23,570 INFO L87 Difference]: Start difference. First operand 244 states and 762 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:23,770 INFO L93 Difference]: Finished difference Result 476 states and 1397 transitions. [2021-06-05 14:30:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:23,772 INFO L225 Difference]: With dead ends: 476 [2021-06-05 14:30:23,772 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 14:30:23,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 14:30:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 250. [2021-06-05 14:30:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.1526104417670684) internal successors, (785), 249 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 785 transitions. [2021-06-05 14:30:23,779 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 785 transitions. Word has length 17 [2021-06-05 14:30:23,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:23,779 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 785 transitions. [2021-06-05 14:30:23,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 785 transitions. [2021-06-05 14:30:23,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:23,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:23,780 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:23,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-05 14:30:23,780 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash -706818726, now seen corresponding path program 30 times [2021-06-05 14:30:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:23,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678982473] [2021-06-05 14:30:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:23,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:23,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678982473] [2021-06-05 14:30:23,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678982473] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:23,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:23,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:30:23,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528018537] [2021-06-05 14:30:23,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:30:23,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:23,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:30:23,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:23,841 INFO L87 Difference]: Start difference. First operand 250 states and 785 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:23,938 INFO L93 Difference]: Finished difference Result 445 states and 1315 transitions. [2021-06-05 14:30:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:30:23,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:23,940 INFO L225 Difference]: With dead ends: 445 [2021-06-05 14:30:23,940 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 14:30:23,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 14:30:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 259. [2021-06-05 14:30:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.197674418604651) internal successors, (825), 258 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 825 transitions. [2021-06-05 14:30:23,946 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 825 transitions. Word has length 17 [2021-06-05 14:30:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:23,947 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 825 transitions. [2021-06-05 14:30:23,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:23,947 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 825 transitions. [2021-06-05 14:30:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:23,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:23,948 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:23,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-05 14:30:23,948 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1915802870, now seen corresponding path program 31 times [2021-06-05 14:30:23,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:23,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179433846] [2021-06-05 14:30:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:24,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:24,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179433846] [2021-06-05 14:30:24,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179433846] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:24,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:24,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:30:24,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578281508] [2021-06-05 14:30:24,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:30:24,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:24,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:30:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:24,007 INFO L87 Difference]: Start difference. First operand 259 states and 825 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:24,095 INFO L93 Difference]: Finished difference Result 458 states and 1353 transitions. [2021-06-05 14:30:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:30:24,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:24,097 INFO L225 Difference]: With dead ends: 458 [2021-06-05 14:30:24,097 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 14:30:24,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:24,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 14:30:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 252. [2021-06-05 14:30:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.139442231075697) internal successors, (788), 251 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-06-05 14:30:24,107 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-06-05 14:30:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:24,107 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-06-05 14:30:24,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,107 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-06-05 14:30:24,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:24,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:24,108 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:24,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-05 14:30:24,109 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash 939630764, now seen corresponding path program 32 times [2021-06-05 14:30:24,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:24,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773131271] [2021-06-05 14:30:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:24,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773131271] [2021-06-05 14:30:24,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773131271] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:24,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:24,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:24,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008508860] [2021-06-05 14:30:24,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:24,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:24,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:24,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:24,199 INFO L87 Difference]: Start difference. First operand 252 states and 788 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:24,391 INFO L93 Difference]: Finished difference Result 403 states and 1169 transitions. [2021-06-05 14:30:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:24,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:24,393 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:30:24,393 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:30:24,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:30:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 254. [2021-06-05 14:30:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.1343873517786562) internal successors, (793), 253 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 793 transitions. [2021-06-05 14:30:24,399 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 793 transitions. Word has length 17 [2021-06-05 14:30:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:24,399 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 793 transitions. [2021-06-05 14:30:24,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 793 transitions. [2021-06-05 14:30:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:24,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:24,400 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:24,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-05 14:30:24,400 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1808762930, now seen corresponding path program 33 times [2021-06-05 14:30:24,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:24,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569510300] [2021-06-05 14:30:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:24,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:24,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569510300] [2021-06-05 14:30:24,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569510300] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:24,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:24,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:24,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784786544] [2021-06-05 14:30:24,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:24,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:24,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:24,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:24,482 INFO L87 Difference]: Start difference. First operand 254 states and 793 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:24,713 INFO L93 Difference]: Finished difference Result 403 states and 1175 transitions. [2021-06-05 14:30:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:24,715 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:30:24,715 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 14:30:24,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 14:30:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 252. [2021-06-05 14:30:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.139442231075697) internal successors, (788), 251 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-06-05 14:30:24,734 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-06-05 14:30:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:24,734 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-06-05 14:30:24,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-06-05 14:30:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:30:24,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:24,735 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:24,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-05 14:30:24,735 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:24,736 INFO L82 PathProgramCache]: Analyzing trace with hash 421173314, now seen corresponding path program 34 times [2021-06-05 14:30:24,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:24,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154198809] [2021-06-05 14:30:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:24,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:24,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154198809] [2021-06-05 14:30:24,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154198809] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:24,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:24,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:30:24,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652604262] [2021-06-05 14:30:24,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:30:24,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:30:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:30:24,780 INFO L87 Difference]: Start difference. First operand 252 states and 788 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:24,846 INFO L93 Difference]: Finished difference Result 380 states and 1126 transitions. [2021-06-05 14:30:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:30:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:30:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:24,848 INFO L225 Difference]: With dead ends: 380 [2021-06-05 14:30:24,848 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 14:30:24,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 14:30:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 252. [2021-06-05 14:30:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.139442231075697) internal successors, (788), 251 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-06-05 14:30:24,853 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-06-05 14:30:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:24,853 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-06-05 14:30:24,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-06-05 14:30:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:24,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:24,854 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:24,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-05 14:30:24,854 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:24,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:24,854 INFO L82 PathProgramCache]: Analyzing trace with hash -847314392, now seen corresponding path program 1 times [2021-06-05 14:30:24,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:24,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508105322] [2021-06-05 14:30:24,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:24,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:24,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508105322] [2021-06-05 14:30:24,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508105322] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:24,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:24,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:24,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103379886] [2021-06-05 14:30:24,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:24,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:24,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:24,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:24,907 INFO L87 Difference]: Start difference. First operand 252 states and 788 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:25,041 INFO L93 Difference]: Finished difference Result 445 states and 1298 transitions. [2021-06-05 14:30:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:25,044 INFO L225 Difference]: With dead ends: 445 [2021-06-05 14:30:25,044 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 14:30:25,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 14:30:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 257. [2021-06-05 14:30:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.12890625) internal successors, (801), 256 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 801 transitions. [2021-06-05 14:30:25,049 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 801 transitions. Word has length 18 [2021-06-05 14:30:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:25,049 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 801 transitions. [2021-06-05 14:30:25,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 801 transitions. [2021-06-05 14:30:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:25,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:25,050 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:25,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-05 14:30:25,050 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash -47426210, now seen corresponding path program 1 times [2021-06-05 14:30:25,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:25,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444528887] [2021-06-05 14:30:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:25,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:25,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444528887] [2021-06-05 14:30:25,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444528887] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:25,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:25,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 14:30:25,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83100482] [2021-06-05 14:30:25,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:25,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:25,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:25,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:25,103 INFO L87 Difference]: Start difference. First operand 257 states and 801 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:25,228 INFO L93 Difference]: Finished difference Result 496 states and 1436 transitions. [2021-06-05 14:30:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:25,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:25,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:25,231 INFO L225 Difference]: With dead ends: 496 [2021-06-05 14:30:25,231 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 14:30:25,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 14:30:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 257. [2021-06-05 14:30:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.12890625) internal successors, (801), 256 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 801 transitions. [2021-06-05 14:30:25,237 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 801 transitions. Word has length 18 [2021-06-05 14:30:25,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:25,237 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 801 transitions. [2021-06-05 14:30:25,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 801 transitions. [2021-06-05 14:30:25,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:25,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:25,238 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:25,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-05 14:30:25,238 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:25,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1111217320, now seen corresponding path program 2 times [2021-06-05 14:30:25,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:25,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25242738] [2021-06-05 14:30:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:25,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:25,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25242738] [2021-06-05 14:30:25,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25242738] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:25,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:25,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:25,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640628862] [2021-06-05 14:30:25,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:25,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:25,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:25,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:25,280 INFO L87 Difference]: Start difference. First operand 257 states and 801 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:25,406 INFO L93 Difference]: Finished difference Result 505 states and 1450 transitions. [2021-06-05 14:30:25,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:25,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:25,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:25,408 INFO L225 Difference]: With dead ends: 505 [2021-06-05 14:30:25,408 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 14:30:25,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:25,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 14:30:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-06-05 14:30:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.135135135135135) internal successors, (812), 259 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 812 transitions. [2021-06-05 14:30:25,414 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 812 transitions. Word has length 18 [2021-06-05 14:30:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:25,414 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 812 transitions. [2021-06-05 14:30:25,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 812 transitions. [2021-06-05 14:30:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:25,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:25,415 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:25,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-05 14:30:25,416 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash -382690402, now seen corresponding path program 3 times [2021-06-05 14:30:25,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:25,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492701007] [2021-06-05 14:30:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:25,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:25,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492701007] [2021-06-05 14:30:25,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492701007] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:25,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:25,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:25,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833797315] [2021-06-05 14:30:25,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:25,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:25,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:25,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:25,459 INFO L87 Difference]: Start difference. First operand 260 states and 812 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:25,580 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-06-05 14:30:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:25,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:25,582 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:30:25,582 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:30:25,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:30:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 260. [2021-06-05 14:30:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.1235521235521237) internal successors, (809), 259 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 809 transitions. [2021-06-05 14:30:25,588 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 809 transitions. Word has length 18 [2021-06-05 14:30:25,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:25,588 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 809 transitions. [2021-06-05 14:30:25,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,588 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 809 transitions. [2021-06-05 14:30:25,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:25,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:25,589 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:25,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-05 14:30:25,589 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:25,589 INFO L82 PathProgramCache]: Analyzing trace with hash -995566800, now seen corresponding path program 4 times [2021-06-05 14:30:25,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:25,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738622899] [2021-06-05 14:30:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:25,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:25,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738622899] [2021-06-05 14:30:25,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738622899] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:25,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:25,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:25,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618876818] [2021-06-05 14:30:25,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:25,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:25,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:25,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:25,633 INFO L87 Difference]: Start difference. First operand 260 states and 809 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:25,772 INFO L93 Difference]: Finished difference Result 481 states and 1389 transitions. [2021-06-05 14:30:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:25,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:25,773 INFO L225 Difference]: With dead ends: 481 [2021-06-05 14:30:25,773 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 14:30:25,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 14:30:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 266. [2021-06-05 14:30:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.1358490566037736) internal successors, (831), 265 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 831 transitions. [2021-06-05 14:30:25,779 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 831 transitions. Word has length 18 [2021-06-05 14:30:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:25,779 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 831 transitions. [2021-06-05 14:30:25,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 831 transitions. [2021-06-05 14:30:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:25,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:25,781 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:25,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-05 14:30:25,781 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1805492774, now seen corresponding path program 5 times [2021-06-05 14:30:25,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:25,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465508506] [2021-06-05 14:30:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:25,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:25,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465508506] [2021-06-05 14:30:25,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465508506] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:25,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:25,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:25,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998523214] [2021-06-05 14:30:25,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:25,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:25,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:25,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:25,826 INFO L87 Difference]: Start difference. First operand 266 states and 831 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:25,975 INFO L93 Difference]: Finished difference Result 487 states and 1396 transitions. [2021-06-05 14:30:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:25,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:25,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:25,976 INFO L225 Difference]: With dead ends: 487 [2021-06-05 14:30:25,976 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 14:30:25,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:25,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 14:30:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 263. [2021-06-05 14:30:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.1297709923664123) internal successors, (820), 262 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 820 transitions. [2021-06-05 14:30:25,982 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 820 transitions. Word has length 18 [2021-06-05 14:30:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:25,982 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 820 transitions. [2021-06-05 14:30:25,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 820 transitions. [2021-06-05 14:30:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:25,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:25,983 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:25,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-05 14:30:25,984 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:25,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:25,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1270262972, now seen corresponding path program 6 times [2021-06-05 14:30:25,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:25,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759562202] [2021-06-05 14:30:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:26,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:26,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759562202] [2021-06-05 14:30:26,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759562202] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:26,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:26,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:26,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338390139] [2021-06-05 14:30:26,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:26,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:26,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:26,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:26,028 INFO L87 Difference]: Start difference. First operand 263 states and 820 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:26,144 INFO L93 Difference]: Finished difference Result 445 states and 1301 transitions. [2021-06-05 14:30:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:26,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:26,149 INFO L225 Difference]: With dead ends: 445 [2021-06-05 14:30:26,149 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 14:30:26,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 14:30:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 263. [2021-06-05 14:30:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.118320610687023) internal successors, (817), 262 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 817 transitions. [2021-06-05 14:30:26,154 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 817 transitions. Word has length 18 [2021-06-05 14:30:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:26,155 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 817 transitions. [2021-06-05 14:30:26,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 817 transitions. [2021-06-05 14:30:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:26,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:26,156 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:26,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-05 14:30:26,156 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:26,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1406182626, now seen corresponding path program 2 times [2021-06-05 14:30:26,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:26,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263677540] [2021-06-05 14:30:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:26,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263677540] [2021-06-05 14:30:26,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263677540] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:26,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:26,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:26,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975232516] [2021-06-05 14:30:26,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:26,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:26,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:26,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:26,223 INFO L87 Difference]: Start difference. First operand 263 states and 817 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:26,419 INFO L93 Difference]: Finished difference Result 571 states and 1616 transitions. [2021-06-05 14:30:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:26,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:26,421 INFO L225 Difference]: With dead ends: 571 [2021-06-05 14:30:26,421 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 14:30:26,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:26,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 14:30:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 268. [2021-06-05 14:30:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.108614232209738) internal successors, (830), 267 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 830 transitions. [2021-06-05 14:30:26,428 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 830 transitions. Word has length 18 [2021-06-05 14:30:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:26,428 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 830 transitions. [2021-06-05 14:30:26,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 830 transitions. [2021-06-05 14:30:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:26,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:26,429 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:26,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-05 14:30:26,429 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1870302100, now seen corresponding path program 3 times [2021-06-05 14:30:26,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:26,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564846560] [2021-06-05 14:30:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:26,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:26,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564846560] [2021-06-05 14:30:26,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564846560] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:26,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:26,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:26,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253254790] [2021-06-05 14:30:26,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:26,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:26,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:26,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:26,478 INFO L87 Difference]: Start difference. First operand 268 states and 830 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:26,649 INFO L93 Difference]: Finished difference Result 596 states and 1673 transitions. [2021-06-05 14:30:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:26,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:26,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:26,650 INFO L225 Difference]: With dead ends: 596 [2021-06-05 14:30:26,650 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 14:30:26,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:26,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 14:30:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 281. [2021-06-05 14:30:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0964285714285715) internal successors, (867), 280 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 867 transitions. [2021-06-05 14:30:26,657 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 867 transitions. Word has length 18 [2021-06-05 14:30:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:26,657 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 867 transitions. [2021-06-05 14:30:26,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 867 transitions. [2021-06-05 14:30:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:26,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:26,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:26,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-05 14:30:26,658 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:26,658 INFO L82 PathProgramCache]: Analyzing trace with hash 429863782, now seen corresponding path program 4 times [2021-06-05 14:30:26,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:26,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902598443] [2021-06-05 14:30:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:26,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:26,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902598443] [2021-06-05 14:30:26,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902598443] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:26,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:26,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:26,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764604530] [2021-06-05 14:30:26,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:26,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:26,709 INFO L87 Difference]: Start difference. First operand 281 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:26,859 INFO L93 Difference]: Finished difference Result 565 states and 1612 transitions. [2021-06-05 14:30:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:26,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:26,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:26,861 INFO L225 Difference]: With dead ends: 565 [2021-06-05 14:30:26,861 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 14:30:26,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 14:30:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 263. [2021-06-05 14:30:26,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.118320610687023) internal successors, (817), 262 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 817 transitions. [2021-06-05 14:30:26,867 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 817 transitions. Word has length 18 [2021-06-05 14:30:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:26,868 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 817 transitions. [2021-06-05 14:30:26,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 817 transitions. [2021-06-05 14:30:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:26,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:26,869 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:26,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-05 14:30:26,869 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash -973318070, now seen corresponding path program 5 times [2021-06-05 14:30:26,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:26,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913506954] [2021-06-05 14:30:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:26,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:26,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913506954] [2021-06-05 14:30:26,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913506954] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:26,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:26,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:26,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166626448] [2021-06-05 14:30:26,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:26,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:26,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:26,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:26,950 INFO L87 Difference]: Start difference. First operand 263 states and 817 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:27,090 INFO L93 Difference]: Finished difference Result 503 states and 1444 transitions. [2021-06-05 14:30:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:27,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:27,091 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:30:27,091 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 14:30:27,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:27,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 14:30:27,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 267. [2021-06-05 14:30:27,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.1090225563909772) internal successors, (827), 266 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 827 transitions. [2021-06-05 14:30:27,096 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 827 transitions. Word has length 18 [2021-06-05 14:30:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:27,096 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 827 transitions. [2021-06-05 14:30:27,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 827 transitions. [2021-06-05 14:30:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:27,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:27,097 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:27,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-05 14:30:27,098 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:27,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:27,098 INFO L82 PathProgramCache]: Analyzing trace with hash 491168226, now seen corresponding path program 6 times [2021-06-05 14:30:27,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:27,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188008935] [2021-06-05 14:30:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:27,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:27,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188008935] [2021-06-05 14:30:27,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188008935] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:27,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:27,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:27,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437071984] [2021-06-05 14:30:27,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:27,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:27,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:27,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:27,149 INFO L87 Difference]: Start difference. First operand 267 states and 827 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:27,248 INFO L93 Difference]: Finished difference Result 493 states and 1423 transitions. [2021-06-05 14:30:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:27,250 INFO L225 Difference]: With dead ends: 493 [2021-06-05 14:30:27,250 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 14:30:27,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 14:30:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 278. [2021-06-05 14:30:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.0902527075812274) internal successors, (856), 277 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 856 transitions. [2021-06-05 14:30:27,254 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 856 transitions. Word has length 18 [2021-06-05 14:30:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:27,255 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 856 transitions. [2021-06-05 14:30:27,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 856 transitions. [2021-06-05 14:30:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:27,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:27,256 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:27,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-05 14:30:27,256 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:27,256 INFO L82 PathProgramCache]: Analyzing trace with hash -275677922, now seen corresponding path program 7 times [2021-06-05 14:30:27,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:27,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313973395] [2021-06-05 14:30:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:27,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:27,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313973395] [2021-06-05 14:30:27,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313973395] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:27,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:27,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:27,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429676550] [2021-06-05 14:30:27,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:27,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:27,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:27,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:27,305 INFO L87 Difference]: Start difference. First operand 278 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:27,398 INFO L93 Difference]: Finished difference Result 462 states and 1366 transitions. [2021-06-05 14:30:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:27,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:27,399 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:30:27,399 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 14:30:27,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 14:30:27,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 267. [2021-06-05 14:30:27,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.1090225563909772) internal successors, (827), 266 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 827 transitions. [2021-06-05 14:30:27,403 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 827 transitions. Word has length 18 [2021-06-05 14:30:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:27,403 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 827 transitions. [2021-06-05 14:30:27,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 827 transitions. [2021-06-05 14:30:27,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:27,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:27,404 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:27,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-05 14:30:27,404 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:27,404 INFO L82 PathProgramCache]: Analyzing trace with hash -799867102, now seen corresponding path program 8 times [2021-06-05 14:30:27,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:27,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200555555] [2021-06-05 14:30:27,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:27,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:27,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200555555] [2021-06-05 14:30:27,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200555555] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:27,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:27,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:27,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723534273] [2021-06-05 14:30:27,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:27,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:27,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:27,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:27,452 INFO L87 Difference]: Start difference. First operand 267 states and 827 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:27,604 INFO L93 Difference]: Finished difference Result 562 states and 1608 transitions. [2021-06-05 14:30:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:27,607 INFO L225 Difference]: With dead ends: 562 [2021-06-05 14:30:27,607 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 14:30:27,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 14:30:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 282. [2021-06-05 14:30:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.117437722419929) internal successors, (876), 281 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 876 transitions. [2021-06-05 14:30:27,614 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 876 transitions. Word has length 18 [2021-06-05 14:30:27,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:27,614 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 876 transitions. [2021-06-05 14:30:27,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,614 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 876 transitions. [2021-06-05 14:30:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:27,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:27,615 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:27,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-05 14:30:27,615 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2054661876, now seen corresponding path program 9 times [2021-06-05 14:30:27,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:27,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467901381] [2021-06-05 14:30:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:27,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:27,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467901381] [2021-06-05 14:30:27,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467901381] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:27,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:27,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:27,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918379512] [2021-06-05 14:30:27,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:27,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:27,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:27,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:27,670 INFO L87 Difference]: Start difference. First operand 282 states and 876 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:27,815 INFO L93 Difference]: Finished difference Result 571 states and 1643 transitions. [2021-06-05 14:30:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:27,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:27,817 INFO L225 Difference]: With dead ends: 571 [2021-06-05 14:30:27,817 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 14:30:27,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 14:30:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 279. [2021-06-05 14:30:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.1223021582733814) internal successors, (868), 278 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 868 transitions. [2021-06-05 14:30:27,824 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 868 transitions. Word has length 18 [2021-06-05 14:30:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:27,824 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 868 transitions. [2021-06-05 14:30:27,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:27,824 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 868 transitions. [2021-06-05 14:30:27,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:27,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:27,825 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:27,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-05 14:30:27,825 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1985003846, now seen corresponding path program 10 times [2021-06-05 14:30:27,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:27,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551507525] [2021-06-05 14:30:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:27,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:27,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551507525] [2021-06-05 14:30:27,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551507525] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:27,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:27,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:27,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307897101] [2021-06-05 14:30:27,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:27,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:27,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:27,880 INFO L87 Difference]: Start difference. First operand 279 states and 868 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:28,032 INFO L93 Difference]: Finished difference Result 552 states and 1575 transitions. [2021-06-05 14:30:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:28,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:28,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:28,034 INFO L225 Difference]: With dead ends: 552 [2021-06-05 14:30:28,034 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 14:30:28,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 14:30:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 283. [2021-06-05 14:30:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.127659574468085) internal successors, (882), 282 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 882 transitions. [2021-06-05 14:30:28,040 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 882 transitions. Word has length 18 [2021-06-05 14:30:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:28,040 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 882 transitions. [2021-06-05 14:30:28,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 882 transitions. [2021-06-05 14:30:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:28,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:28,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:28,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-05 14:30:28,042 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:28,042 INFO L82 PathProgramCache]: Analyzing trace with hash 382898978, now seen corresponding path program 11 times [2021-06-05 14:30:28,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:28,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891424565] [2021-06-05 14:30:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:28,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:28,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891424565] [2021-06-05 14:30:28,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891424565] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:28,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:28,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:28,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414779397] [2021-06-05 14:30:28,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:28,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:28,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:28,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:28,126 INFO L87 Difference]: Start difference. First operand 283 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:28,241 INFO L93 Difference]: Finished difference Result 527 states and 1539 transitions. [2021-06-05 14:30:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:28,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:28,242 INFO L225 Difference]: With dead ends: 527 [2021-06-05 14:30:28,242 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 14:30:28,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 14:30:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 281. [2021-06-05 14:30:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.132142857142857) internal successors, (877), 280 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 877 transitions. [2021-06-05 14:30:28,247 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 877 transitions. Word has length 18 [2021-06-05 14:30:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:28,247 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 877 transitions. [2021-06-05 14:30:28,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 877 transitions. [2021-06-05 14:30:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:28,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:28,248 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:28,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-05 14:30:28,248 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:28,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1962276450, now seen corresponding path program 12 times [2021-06-05 14:30:28,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:28,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561934799] [2021-06-05 14:30:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:28,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:28,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561934799] [2021-06-05 14:30:28,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561934799] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:28,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:28,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:28,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352442644] [2021-06-05 14:30:28,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:28,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:28,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:28,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:28,302 INFO L87 Difference]: Start difference. First operand 281 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:28,424 INFO L93 Difference]: Finished difference Result 528 states and 1534 transitions. [2021-06-05 14:30:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:28,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:28,425 INFO L225 Difference]: With dead ends: 528 [2021-06-05 14:30:28,425 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 14:30:28,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 14:30:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 278. [2021-06-05 14:30:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.115523465703971) internal successors, (863), 277 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 863 transitions. [2021-06-05 14:30:28,431 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 863 transitions. Word has length 18 [2021-06-05 14:30:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:28,431 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 863 transitions. [2021-06-05 14:30:28,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 863 transitions. [2021-06-05 14:30:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:28,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:28,432 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:28,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-05 14:30:28,432 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:28,432 INFO L82 PathProgramCache]: Analyzing trace with hash -708353078, now seen corresponding path program 13 times [2021-06-05 14:30:28,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:28,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099649821] [2021-06-05 14:30:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:28,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:28,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099649821] [2021-06-05 14:30:28,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099649821] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:28,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:28,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:28,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592564232] [2021-06-05 14:30:28,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:28,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:28,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:28,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:28,487 INFO L87 Difference]: Start difference. First operand 278 states and 863 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:28,599 INFO L93 Difference]: Finished difference Result 492 states and 1454 transitions. [2021-06-05 14:30:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:28,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:28,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:28,600 INFO L225 Difference]: With dead ends: 492 [2021-06-05 14:30:28,600 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 14:30:28,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 14:30:28,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 268. [2021-06-05 14:30:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.1198501872659175) internal successors, (833), 267 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 833 transitions. [2021-06-05 14:30:28,606 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 833 transitions. Word has length 18 [2021-06-05 14:30:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:28,606 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 833 transitions. [2021-06-05 14:30:28,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 833 transitions. [2021-06-05 14:30:28,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:28,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:28,607 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:28,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-05 14:30:28,607 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:28,607 INFO L82 PathProgramCache]: Analyzing trace with hash 634121620, now seen corresponding path program 14 times [2021-06-05 14:30:28,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:28,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67263426] [2021-06-05 14:30:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:28,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:28,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67263426] [2021-06-05 14:30:28,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67263426] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:28,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:28,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:28,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418339160] [2021-06-05 14:30:28,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:28,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:28,651 INFO L87 Difference]: Start difference. First operand 268 states and 833 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:28,793 INFO L93 Difference]: Finished difference Result 569 states and 1632 transitions. [2021-06-05 14:30:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:28,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:28,795 INFO L225 Difference]: With dead ends: 569 [2021-06-05 14:30:28,795 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 14:30:28,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 14:30:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 287. [2021-06-05 14:30:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.1083916083916083) internal successors, (889), 286 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 889 transitions. [2021-06-05 14:30:28,801 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 889 transitions. Word has length 18 [2021-06-05 14:30:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:28,801 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 889 transitions. [2021-06-05 14:30:28,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 889 transitions. [2021-06-05 14:30:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:28,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:28,802 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:28,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-06-05 14:30:28,802 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:28,802 INFO L82 PathProgramCache]: Analyzing trace with hash -806316698, now seen corresponding path program 15 times [2021-06-05 14:30:28,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:28,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320703156] [2021-06-05 14:30:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:28,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:28,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320703156] [2021-06-05 14:30:28,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320703156] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:28,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:28,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:28,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286144227] [2021-06-05 14:30:28,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:28,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:28,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:28,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:28,847 INFO L87 Difference]: Start difference. First operand 287 states and 889 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:28,985 INFO L93 Difference]: Finished difference Result 571 states and 1645 transitions. [2021-06-05 14:30:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:28,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:28,986 INFO L225 Difference]: With dead ends: 571 [2021-06-05 14:30:28,986 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 14:30:28,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 14:30:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 284. [2021-06-05 14:30:28,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.1130742049469964) internal successors, (881), 283 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 881 transitions. [2021-06-05 14:30:28,991 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 881 transitions. Word has length 18 [2021-06-05 14:30:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:28,991 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 881 transitions. [2021-06-05 14:30:28,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 881 transitions. [2021-06-05 14:30:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:28,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:28,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:28,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-05 14:30:28,992 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash 269394458, now seen corresponding path program 16 times [2021-06-05 14:30:28,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:28,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260730140] [2021-06-05 14:30:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:29,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:29,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260730140] [2021-06-05 14:30:29,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260730140] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:29,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:29,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:29,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608925036] [2021-06-05 14:30:29,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:29,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:29,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:29,035 INFO L87 Difference]: Start difference. First operand 284 states and 881 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:29,163 INFO L93 Difference]: Finished difference Result 605 states and 1745 transitions. [2021-06-05 14:30:29,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:29,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:29,165 INFO L225 Difference]: With dead ends: 605 [2021-06-05 14:30:29,165 INFO L226 Difference]: Without dead ends: 605 [2021-06-05 14:30:29,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-05 14:30:29,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 281. [2021-06-05 14:30:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.117857142857143) internal successors, (873), 280 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 873 transitions. [2021-06-05 14:30:29,172 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 873 transitions. Word has length 18 [2021-06-05 14:30:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:29,172 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 873 transitions. [2021-06-05 14:30:29,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,172 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 873 transitions. [2021-06-05 14:30:29,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:29,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:29,172 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:29,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-05 14:30:29,173 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash -154077336, now seen corresponding path program 7 times [2021-06-05 14:30:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:29,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865073284] [2021-06-05 14:30:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:29,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:29,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865073284] [2021-06-05 14:30:29,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865073284] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:29,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:29,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:29,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409882463] [2021-06-05 14:30:29,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:29,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:29,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:29,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:29,238 INFO L87 Difference]: Start difference. First operand 281 states and 873 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:29,401 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-06-05 14:30:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:29,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:29,403 INFO L225 Difference]: With dead ends: 576 [2021-06-05 14:30:29,403 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 14:30:29,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 14:30:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 288. [2021-06-05 14:30:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.1498257839721253) internal successors, (904), 287 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 904 transitions. [2021-06-05 14:30:29,409 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 904 transitions. Word has length 18 [2021-06-05 14:30:29,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:29,410 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 904 transitions. [2021-06-05 14:30:29,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 904 transitions. [2021-06-05 14:30:29,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:29,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:29,410 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:29,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-05 14:30:29,410 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:29,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1647985058, now seen corresponding path program 8 times [2021-06-05 14:30:29,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:29,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816542147] [2021-06-05 14:30:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:29,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:29,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816542147] [2021-06-05 14:30:29,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816542147] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:29,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:29,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:29,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986784281] [2021-06-05 14:30:29,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:29,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:29,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:29,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:29,464 INFO L87 Difference]: Start difference. First operand 288 states and 904 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:29,639 INFO L93 Difference]: Finished difference Result 582 states and 1678 transitions. [2021-06-05 14:30:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:29,640 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:29,641 INFO L225 Difference]: With dead ends: 582 [2021-06-05 14:30:29,641 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 14:30:29,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 14:30:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 291. [2021-06-05 14:30:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1241379310344826) internal successors, (906), 290 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 906 transitions. [2021-06-05 14:30:29,648 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 906 transitions. Word has length 18 [2021-06-05 14:30:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:29,648 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 906 transitions. [2021-06-05 14:30:29,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 906 transitions. [2021-06-05 14:30:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:29,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:29,650 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:29,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-05 14:30:29,650 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:29,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:29,650 INFO L82 PathProgramCache]: Analyzing trace with hash 597323102, now seen corresponding path program 9 times [2021-06-05 14:30:29,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:29,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109523038] [2021-06-05 14:30:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:29,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:29,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109523038] [2021-06-05 14:30:29,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109523038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:29,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271634973] [2021-06-05 14:30:29,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:29,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:29,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:29,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:29,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:30,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271634973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:30,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:30,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:30:30,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515801559] [2021-06-05 14:30:30,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:30,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:30,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:30,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:30,037 INFO L87 Difference]: Start difference. First operand 291 states and 906 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:30,463 INFO L93 Difference]: Finished difference Result 573 states and 1656 transitions. [2021-06-05 14:30:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:30,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:30,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:30,464 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:30:30,465 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 14:30:30,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:30:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 14:30:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 284. [2021-06-05 14:30:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.137809187279152) internal successors, (888), 283 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 888 transitions. [2021-06-05 14:30:30,477 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 888 transitions. Word has length 18 [2021-06-05 14:30:30,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:30,477 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 888 transitions. [2021-06-05 14:30:30,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 888 transitions. [2021-06-05 14:30:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:30,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:30,479 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:30,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 14:30:30,704 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:30,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:30,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1889665502, now seen corresponding path program 10 times [2021-06-05 14:30:30,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:30,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027301230] [2021-06-05 14:30:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:30,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:30,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027301230] [2021-06-05 14:30:30,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027301230] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:30,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:30,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:30,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593828279] [2021-06-05 14:30:30,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:30,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:30,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:30,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:30,763 INFO L87 Difference]: Start difference. First operand 284 states and 888 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:30,876 INFO L93 Difference]: Finished difference Result 536 states and 1574 transitions. [2021-06-05 14:30:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:30,877 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:30:30,877 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:30:30,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:30:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 281. [2021-06-05 14:30:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.117857142857143) internal successors, (873), 280 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 873 transitions. [2021-06-05 14:30:30,884 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 873 transitions. Word has length 18 [2021-06-05 14:30:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:30,884 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 873 transitions. [2021-06-05 14:30:30,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 873 transitions. [2021-06-05 14:30:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:30,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:30,899 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:30,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-05 14:30:30,899 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:30,899 INFO L82 PathProgramCache]: Analyzing trace with hash 618059630, now seen corresponding path program 11 times [2021-06-05 14:30:30,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:30,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811664086] [2021-06-05 14:30:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:30,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:30,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811664086] [2021-06-05 14:30:30,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811664086] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:30,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:30,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:30,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474233653] [2021-06-05 14:30:30,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:30,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:30,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:30,953 INFO L87 Difference]: Start difference. First operand 281 states and 873 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:31,082 INFO L93 Difference]: Finished difference Result 573 states and 1648 transitions. [2021-06-05 14:30:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:31,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:31,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:31,084 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:30:31,084 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 14:30:31,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 14:30:31,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 291. [2021-06-05 14:30:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.103448275862069) internal successors, (900), 290 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 900 transitions. [2021-06-05 14:30:31,091 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 900 transitions. Word has length 18 [2021-06-05 14:30:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:31,091 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 900 transitions. [2021-06-05 14:30:31,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 900 transitions. [2021-06-05 14:30:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:31,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:31,092 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:31,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-05 14:30:31,092 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:31,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1297364296, now seen corresponding path program 12 times [2021-06-05 14:30:31,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:31,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209222847] [2021-06-05 14:30:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:31,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209222847] [2021-06-05 14:30:31,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209222847] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:31,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:31,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:31,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941079986] [2021-06-05 14:30:31,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:31,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:31,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:31,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:31,151 INFO L87 Difference]: Start difference. First operand 291 states and 900 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:31,268 INFO L93 Difference]: Finished difference Result 550 states and 1609 transitions. [2021-06-05 14:30:31,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:31,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:31,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:31,269 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:30:31,269 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 14:30:31,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 14:30:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 280. [2021-06-05 14:30:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.10752688172043) internal successors, (867), 279 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-06-05 14:30:31,277 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-06-05 14:30:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:31,277 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-06-05 14:30:31,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-06-05 14:30:31,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:31,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:31,278 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:31,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-05 14:30:31,278 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:31,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1494369000, now seen corresponding path program 13 times [2021-06-05 14:30:31,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:31,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960946541] [2021-06-05 14:30:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:31,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960946541] [2021-06-05 14:30:31,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960946541] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:31,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:31,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:31,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916422196] [2021-06-05 14:30:31,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:31,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:31,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:31,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:31,331 INFO L87 Difference]: Start difference. First operand 280 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:31,452 INFO L93 Difference]: Finished difference Result 511 states and 1487 transitions. [2021-06-05 14:30:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:31,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:31,453 INFO L225 Difference]: With dead ends: 511 [2021-06-05 14:30:31,453 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 14:30:31,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 14:30:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 290. [2021-06-05 14:30:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.093425605536332) internal successors, (894), 289 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 894 transitions. [2021-06-05 14:30:31,459 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 894 transitions. Word has length 18 [2021-06-05 14:30:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:31,460 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 894 transitions. [2021-06-05 14:30:31,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 894 transitions. [2021-06-05 14:30:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:31,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:31,461 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:31,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-05 14:30:31,462 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash 885174370, now seen corresponding path program 14 times [2021-06-05 14:30:31,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:31,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197692169] [2021-06-05 14:30:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:31,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197692169] [2021-06-05 14:30:31,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197692169] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:31,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:31,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:31,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009935504] [2021-06-05 14:30:31,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:31,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:31,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:31,514 INFO L87 Difference]: Start difference. First operand 290 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:31,617 INFO L93 Difference]: Finished difference Result 482 states and 1433 transitions. [2021-06-05 14:30:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:31,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:31,618 INFO L225 Difference]: With dead ends: 482 [2021-06-05 14:30:31,618 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 14:30:31,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 14:30:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 278. [2021-06-05 14:30:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.111913357400722) internal successors, (862), 277 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 862 transitions. [2021-06-05 14:30:31,626 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 862 transitions. Word has length 18 [2021-06-05 14:30:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:31,627 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 862 transitions. [2021-06-05 14:30:31,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 862 transitions. [2021-06-05 14:30:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:31,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:31,628 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:31,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-05 14:30:31,628 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:31,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1700413548, now seen corresponding path program 17 times [2021-06-05 14:30:31,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:31,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832474429] [2021-06-05 14:30:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:31,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832474429] [2021-06-05 14:30:31,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832474429] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:31,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:31,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:31,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741657905] [2021-06-05 14:30:31,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:31,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:31,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:31,676 INFO L87 Difference]: Start difference. First operand 278 states and 862 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:31,813 INFO L93 Difference]: Finished difference Result 591 states and 1712 transitions. [2021-06-05 14:30:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:31,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:31,814 INFO L225 Difference]: With dead ends: 591 [2021-06-05 14:30:31,814 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 14:30:31,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 14:30:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 265. [2021-06-05 14:30:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.1136363636363638) internal successors, (822), 264 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 822 transitions. [2021-06-05 14:30:31,822 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 822 transitions. Word has length 18 [2021-06-05 14:30:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:31,822 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 822 transitions. [2021-06-05 14:30:31,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 822 transitions. [2021-06-05 14:30:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:31,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:31,823 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:31,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-05 14:30:31,823 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:31,823 INFO L82 PathProgramCache]: Analyzing trace with hash 920966376, now seen corresponding path program 18 times [2021-06-05 14:30:31,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:31,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430433992] [2021-06-05 14:30:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:31,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:31,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430433992] [2021-06-05 14:30:31,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430433992] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:31,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:31,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:31,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653685431] [2021-06-05 14:30:31,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:31,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:31,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:31,897 INFO L87 Difference]: Start difference. First operand 265 states and 822 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:32,008 INFO L93 Difference]: Finished difference Result 471 states and 1344 transitions. [2021-06-05 14:30:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:32,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:32,010 INFO L225 Difference]: With dead ends: 471 [2021-06-05 14:30:32,010 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 14:30:32,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 14:30:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 265. [2021-06-05 14:30:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.0946969696969697) internal successors, (817), 264 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 817 transitions. [2021-06-05 14:30:32,016 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 817 transitions. Word has length 18 [2021-06-05 14:30:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:32,017 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 817 transitions. [2021-06-05 14:30:32,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 817 transitions. [2021-06-05 14:30:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:32,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:32,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:32,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-06-05 14:30:32,018 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:32,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:32,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1720854558, now seen corresponding path program 15 times [2021-06-05 14:30:32,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:32,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862955170] [2021-06-05 14:30:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:32,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:32,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862955170] [2021-06-05 14:30:32,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862955170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:32,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775001276] [2021-06-05 14:30:32,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:32,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:32,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:32,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:32,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775001276] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:32,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:32,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2021-06-05 14:30:32,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057893911] [2021-06-05 14:30:32,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:32,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:32,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:32,237 INFO L87 Difference]: Start difference. First operand 265 states and 817 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:32,408 INFO L93 Difference]: Finished difference Result 427 states and 1257 transitions. [2021-06-05 14:30:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:32,409 INFO L225 Difference]: With dead ends: 427 [2021-06-05 14:30:32,409 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 14:30:32,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 14:30:32,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 272. [2021-06-05 14:30:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.1180811808118083) internal successors, (845), 271 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 845 transitions. [2021-06-05 14:30:32,414 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 845 transitions. Word has length 18 [2021-06-05 14:30:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:32,414 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 845 transitions. [2021-06-05 14:30:32,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 845 transitions. [2021-06-05 14:30:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:32,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:32,415 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:32,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 14:30:32,616 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:32,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:32,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1415469208, now seen corresponding path program 16 times [2021-06-05 14:30:32,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:32,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462065171] [2021-06-05 14:30:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:32,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:32,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462065171] [2021-06-05 14:30:32,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462065171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:32,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327746394] [2021-06-05 14:30:32,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:32,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:32,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:32,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:32,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:32,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327746394] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:32,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:32,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 14:30:32,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058487948] [2021-06-05 14:30:32,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:32,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:32,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:32,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:32,795 INFO L87 Difference]: Start difference. First operand 272 states and 845 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:32,949 INFO L93 Difference]: Finished difference Result 468 states and 1355 transitions. [2021-06-05 14:30:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:32,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:32,951 INFO L225 Difference]: With dead ends: 468 [2021-06-05 14:30:32,951 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 14:30:32,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 14:30:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 278. [2021-06-05 14:30:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.1407942238267146) internal successors, (870), 277 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 870 transitions. [2021-06-05 14:30:32,957 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 870 transitions. Word has length 18 [2021-06-05 14:30:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:32,957 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 870 transitions. [2021-06-05 14:30:32,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 870 transitions. [2021-06-05 14:30:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:32,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:32,958 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:33,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:33,181 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1385590366, now seen corresponding path program 17 times [2021-06-05 14:30:33,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:33,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868880575] [2021-06-05 14:30:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:33,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:33,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868880575] [2021-06-05 14:30:33,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868880575] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:33,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:33,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:33,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058134147] [2021-06-05 14:30:33,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:33,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:33,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:33,236 INFO L87 Difference]: Start difference. First operand 278 states and 870 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:33,359 INFO L93 Difference]: Finished difference Result 400 states and 1209 transitions. [2021-06-05 14:30:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:30:33,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:33,361 INFO L225 Difference]: With dead ends: 400 [2021-06-05 14:30:33,361 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 14:30:33,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 14:30:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 270. [2021-06-05 14:30:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-06-05 14:30:33,365 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-06-05 14:30:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:33,365 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-06-05 14:30:33,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-06-05 14:30:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:33,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:33,366 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:33,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-06-05 14:30:33,366 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1458534320, now seen corresponding path program 19 times [2021-06-05 14:30:33,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:33,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886194517] [2021-06-05 14:30:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:33,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:33,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886194517] [2021-06-05 14:30:33,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886194517] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:33,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:33,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:33,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490935447] [2021-06-05 14:30:33,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:33,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:33,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:33,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:33,419 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:33,568 INFO L93 Difference]: Finished difference Result 527 states and 1494 transitions. [2021-06-05 14:30:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:33,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:33,569 INFO L225 Difference]: With dead ends: 527 [2021-06-05 14:30:33,569 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 14:30:33,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 14:30:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 274. [2021-06-05 14:30:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.1355311355311355) internal successors, (856), 273 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 856 transitions. [2021-06-05 14:30:33,578 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 856 transitions. Word has length 18 [2021-06-05 14:30:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:33,578 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 856 transitions. [2021-06-05 14:30:33,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 856 transitions. [2021-06-05 14:30:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:33,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:33,579 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:33,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-06-05 14:30:33,579 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash 5951976, now seen corresponding path program 20 times [2021-06-05 14:30:33,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:33,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346506173] [2021-06-05 14:30:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:33,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:33,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346506173] [2021-06-05 14:30:33,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346506173] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:33,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:33,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:33,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996042441] [2021-06-05 14:30:33,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:33,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:33,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:33,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:33,624 INFO L87 Difference]: Start difference. First operand 274 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:33,788 INFO L93 Difference]: Finished difference Result 517 states and 1473 transitions. [2021-06-05 14:30:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:33,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:33,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:33,789 INFO L225 Difference]: With dead ends: 517 [2021-06-05 14:30:33,789 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 14:30:33,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:33,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 14:30:33,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 285. [2021-06-05 14:30:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.1161971830985915) internal successors, (885), 284 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 885 transitions. [2021-06-05 14:30:33,804 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 885 transitions. Word has length 18 [2021-06-05 14:30:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:33,804 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 885 transitions. [2021-06-05 14:30:33,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 885 transitions. [2021-06-05 14:30:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:33,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:33,805 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:33,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-06-05 14:30:33,805 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:33,805 INFO L82 PathProgramCache]: Analyzing trace with hash -760894172, now seen corresponding path program 21 times [2021-06-05 14:30:33,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:33,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031692381] [2021-06-05 14:30:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:33,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:33,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031692381] [2021-06-05 14:30:33,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031692381] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:33,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:33,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:33,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079748596] [2021-06-05 14:30:33,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:33,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:33,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:33,853 INFO L87 Difference]: Start difference. First operand 285 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:34,004 INFO L93 Difference]: Finished difference Result 486 states and 1416 transitions. [2021-06-05 14:30:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:34,005 INFO L225 Difference]: With dead ends: 486 [2021-06-05 14:30:34,005 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 14:30:34,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:34,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 14:30:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 270. [2021-06-05 14:30:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-06-05 14:30:34,010 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-06-05 14:30:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:34,010 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-06-05 14:30:34,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-06-05 14:30:34,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:34,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:34,011 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:34,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-06-05 14:30:34,011 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:34,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:34,012 INFO L82 PathProgramCache]: Analyzing trace with hash -755535640, now seen corresponding path program 18 times [2021-06-05 14:30:34,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:34,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022119815] [2021-06-05 14:30:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:34,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:34,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022119815] [2021-06-05 14:30:34,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022119815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:34,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168561132] [2021-06-05 14:30:34,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:34,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:34,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:34,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:34,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168561132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:34,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:34,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 14:30:34,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811002694] [2021-06-05 14:30:34,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:34,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:34,202 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:34,469 INFO L93 Difference]: Finished difference Result 822 states and 2325 transitions. [2021-06-05 14:30:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:30:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:34,472 INFO L225 Difference]: With dead ends: 822 [2021-06-05 14:30:34,472 INFO L226 Difference]: Without dead ends: 822 [2021-06-05 14:30:34,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:30:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-05 14:30:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 276. [2021-06-05 14:30:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1636363636363636) internal successors, (870), 275 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 870 transitions. [2021-06-05 14:30:34,478 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 870 transitions. Word has length 18 [2021-06-05 14:30:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:34,479 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 870 transitions. [2021-06-05 14:30:34,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 870 transitions. [2021-06-05 14:30:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:34,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:34,479 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:34,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:34,680 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:34,680 INFO L82 PathProgramCache]: Analyzing trace with hash 877515752, now seen corresponding path program 19 times [2021-06-05 14:30:34,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:34,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246510731] [2021-06-05 14:30:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:34,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:34,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246510731] [2021-06-05 14:30:34,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246510731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:34,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623560517] [2021-06-05 14:30:34,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:34,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:34,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:34,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623560517] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:34,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:34,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-05 14:30:34,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740171748] [2021-06-05 14:30:34,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:34,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:34,871 INFO L87 Difference]: Start difference. First operand 276 states and 870 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:35,035 INFO L93 Difference]: Finished difference Result 512 states and 1502 transitions. [2021-06-05 14:30:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:35,037 INFO L225 Difference]: With dead ends: 512 [2021-06-05 14:30:35,037 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 14:30:35,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 14:30:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 279. [2021-06-05 14:30:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.183453237410072) internal successors, (885), 278 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 885 transitions. [2021-06-05 14:30:35,043 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 885 transitions. Word has length 18 [2021-06-05 14:30:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:35,044 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 885 transitions. [2021-06-05 14:30:35,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 885 transitions. [2021-06-05 14:30:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:35,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:35,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:35,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 14:30:35,270 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:35,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1079621204, now seen corresponding path program 20 times [2021-06-05 14:30:35,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:35,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129616921] [2021-06-05 14:30:35,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:35,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129616921] [2021-06-05 14:30:35,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129616921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:35,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94404822] [2021-06-05 14:30:35,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:35,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:35,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:35,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:35,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94404822] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:35,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:35,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-05 14:30:35,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990429883] [2021-06-05 14:30:35,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:35,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:35,482 INFO L87 Difference]: Start difference. First operand 279 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:35,606 INFO L93 Difference]: Finished difference Result 479 states and 1425 transitions. [2021-06-05 14:30:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:35,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:35,607 INFO L225 Difference]: With dead ends: 479 [2021-06-05 14:30:35,608 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 14:30:35,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 14:30:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 270. [2021-06-05 14:30:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-06-05 14:30:35,613 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-06-05 14:30:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:35,613 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-06-05 14:30:35,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-06-05 14:30:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:35,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:35,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:35,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:35,829 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:35,829 INFO L82 PathProgramCache]: Analyzing trace with hash 209328886, now seen corresponding path program 21 times [2021-06-05 14:30:35,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:35,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617926273] [2021-06-05 14:30:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:35,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:35,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617926273] [2021-06-05 14:30:35,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617926273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:35,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837319943] [2021-06-05 14:30:35,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:35,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:35,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:36,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837319943] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:36,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:36,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 14:30:36,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831162512] [2021-06-05 14:30:36,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:36,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:36,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:36,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:36,037 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:36,227 INFO L93 Difference]: Finished difference Result 554 states and 1604 transitions. [2021-06-05 14:30:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:36,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:36,228 INFO L225 Difference]: With dead ends: 554 [2021-06-05 14:30:36,228 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:30:36,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:30:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 274. [2021-06-05 14:30:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.161172161172161) internal successors, (863), 273 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 863 transitions. [2021-06-05 14:30:36,235 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 863 transitions. Word has length 18 [2021-06-05 14:30:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:36,235 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 863 transitions. [2021-06-05 14:30:36,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 863 transitions. [2021-06-05 14:30:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:36,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:36,236 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:36,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:36,449 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:36,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1284578836, now seen corresponding path program 22 times [2021-06-05 14:30:36,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:36,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088175854] [2021-06-05 14:30:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:36,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:36,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088175854] [2021-06-05 14:30:36,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088175854] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:36,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:36,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:36,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591832219] [2021-06-05 14:30:36,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:36,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:36,498 INFO L87 Difference]: Start difference. First operand 274 states and 863 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:36,609 INFO L93 Difference]: Finished difference Result 540 states and 1553 transitions. [2021-06-05 14:30:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:36,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:36,610 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:30:36,610 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 14:30:36,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 14:30:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 280. [2021-06-05 14:30:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.150537634408602) internal successors, (879), 279 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 879 transitions. [2021-06-05 14:30:36,616 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 879 transitions. Word has length 18 [2021-06-05 14:30:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:36,616 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 879 transitions. [2021-06-05 14:30:36,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 879 transitions. [2021-06-05 14:30:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:36,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:36,617 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:36,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-06-05 14:30:36,617 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:36,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1824747200, now seen corresponding path program 22 times [2021-06-05 14:30:36,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:36,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855473741] [2021-06-05 14:30:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:36,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:36,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855473741] [2021-06-05 14:30:36,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855473741] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:36,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:36,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:36,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106768646] [2021-06-05 14:30:36,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:36,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:36,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:36,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:36,685 INFO L87 Difference]: Start difference. First operand 280 states and 879 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:36,855 INFO L93 Difference]: Finished difference Result 543 states and 1546 transitions. [2021-06-05 14:30:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:36,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:36,856 INFO L225 Difference]: With dead ends: 543 [2021-06-05 14:30:36,856 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:30:36,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:30:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 291. [2021-06-05 14:30:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1310344827586207) internal successors, (908), 290 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 908 transitions. [2021-06-05 14:30:36,862 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 908 transitions. Word has length 18 [2021-06-05 14:30:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:36,862 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 908 transitions. [2021-06-05 14:30:36,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 908 transitions. [2021-06-05 14:30:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:36,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:36,863 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:36,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-06-05 14:30:36,863 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:36,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:36,864 INFO L82 PathProgramCache]: Analyzing trace with hash -102317272, now seen corresponding path program 23 times [2021-06-05 14:30:36,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:36,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655858085] [2021-06-05 14:30:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:36,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:36,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655858085] [2021-06-05 14:30:36,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655858085] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:36,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:36,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:36,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835073720] [2021-06-05 14:30:36,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:36,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:36,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:36,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:36,912 INFO L87 Difference]: Start difference. First operand 291 states and 908 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:37,065 INFO L93 Difference]: Finished difference Result 542 states and 1551 transitions. [2021-06-05 14:30:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:37,066 INFO L225 Difference]: With dead ends: 542 [2021-06-05 14:30:37,066 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 14:30:37,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 14:30:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 289. [2021-06-05 14:30:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1354166666666665) internal successors, (903), 288 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 903 transitions. [2021-06-05 14:30:37,072 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 903 transitions. Word has length 18 [2021-06-05 14:30:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:37,072 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 903 transitions. [2021-06-05 14:30:37,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 903 transitions. [2021-06-05 14:30:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:37,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:37,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:37,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-06-05 14:30:37,073 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash 960729324, now seen corresponding path program 23 times [2021-06-05 14:30:37,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:37,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124088996] [2021-06-05 14:30:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:37,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124088996] [2021-06-05 14:30:37,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124088996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378751240] [2021-06-05 14:30:37,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:37,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:37,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:37,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:37,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378751240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:37,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:30:37,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989462523] [2021-06-05 14:30:37,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:37,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:37,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:37,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:37,268 INFO L87 Difference]: Start difference. First operand 289 states and 903 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:37,581 INFO L93 Difference]: Finished difference Result 752 states and 2121 transitions. [2021-06-05 14:30:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:30:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:37,584 INFO L225 Difference]: With dead ends: 752 [2021-06-05 14:30:37,584 INFO L226 Difference]: Without dead ends: 752 [2021-06-05 14:30:37,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:30:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-06-05 14:30:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 292. [2021-06-05 14:30:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.154639175257732) internal successors, (918), 291 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 918 transitions. [2021-06-05 14:30:37,591 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 918 transitions. Word has length 18 [2021-06-05 14:30:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:37,591 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 918 transitions. [2021-06-05 14:30:37,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 918 transitions. [2021-06-05 14:30:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:37,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:37,592 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:37,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 14:30:37,810 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:37,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2041895572, now seen corresponding path program 24 times [2021-06-05 14:30:37,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:37,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020501659] [2021-06-05 14:30:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:37,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:37,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020501659] [2021-06-05 14:30:37,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020501659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:37,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536136233] [2021-06-05 14:30:37,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:37,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:37,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:37,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:37,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536136233] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:38,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:38,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 14:30:38,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85490648] [2021-06-05 14:30:38,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:38,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:38,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:38,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:38,018 INFO L87 Difference]: Start difference. First operand 292 states and 918 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:38,153 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2021-06-05 14:30:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:38,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:38,155 INFO L225 Difference]: With dead ends: 546 [2021-06-05 14:30:38,155 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 14:30:38,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 14:30:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 289. [2021-06-05 14:30:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1354166666666665) internal successors, (903), 288 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 903 transitions. [2021-06-05 14:30:38,159 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 903 transitions. Word has length 18 [2021-06-05 14:30:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:38,159 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 903 transitions. [2021-06-05 14:30:38,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 903 transitions. [2021-06-05 14:30:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:38,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:38,161 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:38,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:38,368 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash 981465852, now seen corresponding path program 25 times [2021-06-05 14:30:38,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:38,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268746684] [2021-06-05 14:30:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:38,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268746684] [2021-06-05 14:30:38,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268746684] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:38,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:38,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:38,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282484031] [2021-06-05 14:30:38,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:38,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:38,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:38,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:38,444 INFO L87 Difference]: Start difference. First operand 289 states and 903 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:38,541 INFO L93 Difference]: Finished difference Result 506 states and 1473 transitions. [2021-06-05 14:30:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:38,542 INFO L225 Difference]: With dead ends: 506 [2021-06-05 14:30:38,542 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 14:30:38,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 14:30:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 293. [2021-06-05 14:30:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.1404109589041096) internal successors, (917), 292 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 917 transitions. [2021-06-05 14:30:38,548 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 917 transitions. Word has length 18 [2021-06-05 14:30:38,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:38,548 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 917 transitions. [2021-06-05 14:30:38,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 917 transitions. [2021-06-05 14:30:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:38,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:38,549 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:38,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-06-05 14:30:38,550 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash -933958074, now seen corresponding path program 26 times [2021-06-05 14:30:38,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:38,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925684572] [2021-06-05 14:30:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:38,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925684572] [2021-06-05 14:30:38,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925684572] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:38,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:38,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:38,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001497633] [2021-06-05 14:30:38,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:38,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:38,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:38,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:38,601 INFO L87 Difference]: Start difference. First operand 293 states and 917 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:38,732 INFO L93 Difference]: Finished difference Result 524 states and 1524 transitions. [2021-06-05 14:30:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:38,734 INFO L225 Difference]: With dead ends: 524 [2021-06-05 14:30:38,734 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 14:30:38,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 14:30:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 291. [2021-06-05 14:30:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1448275862068966) internal successors, (912), 290 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 912 transitions. [2021-06-05 14:30:38,740 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 912 transitions. Word has length 18 [2021-06-05 14:30:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:38,741 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 912 transitions. [2021-06-05 14:30:38,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 912 transitions. [2021-06-05 14:30:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:38,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:38,741 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:38,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-06-05 14:30:38,742 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1193569328, now seen corresponding path program 24 times [2021-06-05 14:30:38,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:38,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513936287] [2021-06-05 14:30:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:38,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513936287] [2021-06-05 14:30:38,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513936287] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:38,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:38,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:38,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839788122] [2021-06-05 14:30:38,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:38,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:38,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:38,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:38,793 INFO L87 Difference]: Start difference. First operand 291 states and 912 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:38,918 INFO L93 Difference]: Finished difference Result 518 states and 1506 transitions. [2021-06-05 14:30:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:38,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:38,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:38,921 INFO L225 Difference]: With dead ends: 518 [2021-06-05 14:30:38,921 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 14:30:38,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 14:30:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 276. [2021-06-05 14:30:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1163636363636362) internal successors, (857), 275 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-06-05 14:30:38,926 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-06-05 14:30:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:38,927 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-06-05 14:30:38,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-06-05 14:30:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:38,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:38,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:38,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-06-05 14:30:38,928 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1775654886, now seen corresponding path program 25 times [2021-06-05 14:30:38,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:38,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955833949] [2021-06-05 14:30:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:38,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:38,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955833949] [2021-06-05 14:30:38,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955833949] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:38,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:38,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:38,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755560069] [2021-06-05 14:30:38,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:38,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:38,965 INFO L87 Difference]: Start difference. First operand 276 states and 857 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:39,064 INFO L93 Difference]: Finished difference Result 413 states and 1194 transitions. [2021-06-05 14:30:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:39,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:39,065 INFO L225 Difference]: With dead ends: 413 [2021-06-05 14:30:39,065 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 14:30:39,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 14:30:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 280. [2021-06-05 14:30:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.10752688172043) internal successors, (867), 279 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-06-05 14:30:39,071 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-06-05 14:30:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:39,072 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-06-05 14:30:39,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-06-05 14:30:39,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:39,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:39,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-06-05 14:30:39,074 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1054826114, now seen corresponding path program 26 times [2021-06-05 14:30:39,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621780078] [2021-06-05 14:30:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621780078] [2021-06-05 14:30:39,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621780078] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:39,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:39,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:39,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734383269] [2021-06-05 14:30:39,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:39,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:39,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:39,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:39,114 INFO L87 Difference]: Start difference. First operand 280 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:39,253 INFO L93 Difference]: Finished difference Result 434 states and 1236 transitions. [2021-06-05 14:30:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:39,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:39,254 INFO L225 Difference]: With dead ends: 434 [2021-06-05 14:30:39,254 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 14:30:39,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:39,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 14:30:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 291. [2021-06-05 14:30:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.089655172413793) internal successors, (896), 290 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 896 transitions. [2021-06-05 14:30:39,261 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 896 transitions. Word has length 18 [2021-06-05 14:30:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:39,261 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 896 transitions. [2021-06-05 14:30:39,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 896 transitions. [2021-06-05 14:30:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:39,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:39,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-06-05 14:30:39,262 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1821672262, now seen corresponding path program 27 times [2021-06-05 14:30:39,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169482712] [2021-06-05 14:30:39,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169482712] [2021-06-05 14:30:39,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169482712] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:39,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:39,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:39,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574722504] [2021-06-05 14:30:39,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:39,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:39,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:39,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:39,304 INFO L87 Difference]: Start difference. First operand 291 states and 896 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:39,425 INFO L93 Difference]: Finished difference Result 403 states and 1179 transitions. [2021-06-05 14:30:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:39,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:39,427 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:30:39,427 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 14:30:39,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 14:30:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 276. [2021-06-05 14:30:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1163636363636362) internal successors, (857), 275 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-06-05 14:30:39,432 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-06-05 14:30:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:39,432 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-06-05 14:30:39,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-06-05 14:30:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:39,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:39,433 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-06-05 14:30:39,433 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1488855460, now seen corresponding path program 28 times [2021-06-05 14:30:39,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655417474] [2021-06-05 14:30:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655417474] [2021-06-05 14:30:39,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655417474] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:39,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:39,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:39,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888888632] [2021-06-05 14:30:39,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:39,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:39,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:39,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:39,472 INFO L87 Difference]: Start difference. First operand 276 states and 857 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:39,590 INFO L93 Difference]: Finished difference Result 446 states and 1266 transitions. [2021-06-05 14:30:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:39,591 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:39,592 INFO L225 Difference]: With dead ends: 446 [2021-06-05 14:30:39,592 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:30:39,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:30:39,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 291. [2021-06-05 14:30:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.0965517241379312) internal successors, (898), 290 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 898 transitions. [2021-06-05 14:30:39,598 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 898 transitions. Word has length 18 [2021-06-05 14:30:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:39,598 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 898 transitions. [2021-06-05 14:30:39,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,598 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 898 transitions. [2021-06-05 14:30:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:39,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:39,599 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-06-05 14:30:39,599 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2039265688, now seen corresponding path program 29 times [2021-06-05 14:30:39,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102961817] [2021-06-05 14:30:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102961817] [2021-06-05 14:30:39,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102961817] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:39,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:39,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:39,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413223185] [2021-06-05 14:30:39,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:39,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:39,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:39,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:39,638 INFO L87 Difference]: Start difference. First operand 291 states and 898 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:39,764 INFO L93 Difference]: Finished difference Result 445 states and 1271 transitions. [2021-06-05 14:30:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:39,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:39,765 INFO L225 Difference]: With dead ends: 445 [2021-06-05 14:30:39,765 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 14:30:39,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:39,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 14:30:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 289. [2021-06-05 14:30:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1006944444444446) internal successors, (893), 288 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 893 transitions. [2021-06-05 14:30:39,771 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 893 transitions. Word has length 18 [2021-06-05 14:30:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:39,771 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 893 transitions. [2021-06-05 14:30:39,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 893 transitions. [2021-06-05 14:30:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:39,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:39,772 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-06-05 14:30:39,772 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1080210964, now seen corresponding path program 30 times [2021-06-05 14:30:39,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465841297] [2021-06-05 14:30:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465841297] [2021-06-05 14:30:39,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465841297] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:39,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:39,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:39,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081780198] [2021-06-05 14:30:39,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:39,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:39,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:39,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:39,806 INFO L87 Difference]: Start difference. First operand 289 states and 893 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:39,924 INFO L93 Difference]: Finished difference Result 419 states and 1219 transitions. [2021-06-05 14:30:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:39,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:39,925 INFO L225 Difference]: With dead ends: 419 [2021-06-05 14:30:39,925 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 14:30:39,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 14:30:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 284. [2021-06-05 14:30:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0989399293286217) internal successors, (877), 283 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 877 transitions. [2021-06-05 14:30:39,931 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 877 transitions. Word has length 18 [2021-06-05 14:30:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:39,931 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 877 transitions. [2021-06-05 14:30:39,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 877 transitions. [2021-06-05 14:30:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:39,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:39,932 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:39,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-06-05 14:30:39,932 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:39,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2028469348, now seen corresponding path program 27 times [2021-06-05 14:30:39,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:39,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975461023] [2021-06-05 14:30:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:39,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975461023] [2021-06-05 14:30:39,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975461023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:39,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487499400] [2021-06-05 14:30:39,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:40,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:40,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:40,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:40,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487499400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:40,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 14:30:40,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308578537] [2021-06-05 14:30:40,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:30:40,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:40,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:30:40,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:40,105 INFO L87 Difference]: Start difference. First operand 284 states and 877 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:40,254 INFO L93 Difference]: Finished difference Result 475 states and 1391 transitions. [2021-06-05 14:30:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:40,255 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:30:40,255 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:30:40,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:30:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 280. [2021-06-05 14:30:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.078853046594982) internal successors, (859), 279 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-06-05 14:30:40,261 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 18 [2021-06-05 14:30:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:40,262 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-06-05 14:30:40,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-06-05 14:30:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:40,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:40,263 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:40,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:40,485 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -395417956, now seen corresponding path program 28 times [2021-06-05 14:30:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:40,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009904003] [2021-06-05 14:30:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:40,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:40,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009904003] [2021-06-05 14:30:40,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009904003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565967210] [2021-06-05 14:30:40,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:40,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:40,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:40,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:40,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:40,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565967210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:40,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:40,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:40,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543721442] [2021-06-05 14:30:40,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:40,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:40,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:40,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:40,641 INFO L87 Difference]: Start difference. First operand 280 states and 859 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:40,772 INFO L93 Difference]: Finished difference Result 479 states and 1383 transitions. [2021-06-05 14:30:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:40,773 INFO L225 Difference]: With dead ends: 479 [2021-06-05 14:30:40,773 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 14:30:40,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 14:30:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 279. [2021-06-05 14:30:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.0719424460431655) internal successors, (854), 278 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 854 transitions. [2021-06-05 14:30:40,778 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 854 transitions. Word has length 18 [2021-06-05 14:30:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:40,778 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 854 transitions. [2021-06-05 14:30:40,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 854 transitions. [2021-06-05 14:30:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:40,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:40,778 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:40,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:40,979 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:40,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1942412384, now seen corresponding path program 29 times [2021-06-05 14:30:40,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:40,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114256122] [2021-06-05 14:30:40,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:41,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:41,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114256122] [2021-06-05 14:30:41,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114256122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:41,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039120183] [2021-06-05 14:30:41,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:41,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:41,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:41,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:41,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:41,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039120183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:41,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:41,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:30:41,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618117261] [2021-06-05 14:30:41,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:30:41,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:41,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:30:41,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:41,140 INFO L87 Difference]: Start difference. First operand 279 states and 854 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:41,274 INFO L93 Difference]: Finished difference Result 436 states and 1286 transitions. [2021-06-05 14:30:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:41,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:41,275 INFO L225 Difference]: With dead ends: 436 [2021-06-05 14:30:41,275 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 14:30:41,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:41,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 14:30:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 262. [2021-06-05 14:30:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0383141762452106) internal successors, (793), 261 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 793 transitions. [2021-06-05 14:30:41,281 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 793 transitions. Word has length 18 [2021-06-05 14:30:41,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:41,281 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 793 transitions. [2021-06-05 14:30:41,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 793 transitions. [2021-06-05 14:30:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:41,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:41,282 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:41,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 14:30:41,504 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:41,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1829110872, now seen corresponding path program 30 times [2021-06-05 14:30:41,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:41,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109614398] [2021-06-05 14:30:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:41,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:41,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109614398] [2021-06-05 14:30:41,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109614398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:41,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403445335] [2021-06-05 14:30:41,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:41,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:41,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:41,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:41,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:41,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403445335] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:41,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:41,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-05 14:30:41,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189819844] [2021-06-05 14:30:41,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:41,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:41,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:41,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:41,660 INFO L87 Difference]: Start difference. First operand 262 states and 793 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:41,767 INFO L93 Difference]: Finished difference Result 450 states and 1301 transitions. [2021-06-05 14:30:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:41,768 INFO L225 Difference]: With dead ends: 450 [2021-06-05 14:30:41,768 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 14:30:41,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 14:30:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 268. [2021-06-05 14:30:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.0711610486891385) internal successors, (820), 267 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 820 transitions. [2021-06-05 14:30:41,774 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 820 transitions. Word has length 18 [2021-06-05 14:30:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:41,774 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 820 transitions. [2021-06-05 14:30:41,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 820 transitions. [2021-06-05 14:30:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:41,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:41,774 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:41,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 14:30:41,989 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:41,989 INFO L82 PathProgramCache]: Analyzing trace with hash 508719468, now seen corresponding path program 31 times [2021-06-05 14:30:41,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:41,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023589023] [2021-06-05 14:30:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:42,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023589023] [2021-06-05 14:30:42,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023589023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229136139] [2021-06-05 14:30:42,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:42,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:42,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229136139] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:42,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:42,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-05 14:30:42,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715224853] [2021-06-05 14:30:42,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:42,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:42,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:42,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:42,146 INFO L87 Difference]: Start difference. First operand 268 states and 820 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:42,270 INFO L93 Difference]: Finished difference Result 456 states and 1316 transitions. [2021-06-05 14:30:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:42,272 INFO L225 Difference]: With dead ends: 456 [2021-06-05 14:30:42,272 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:30:42,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:30:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:30:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 265. [2021-06-05 14:30:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.0492424242424243) internal successors, (805), 264 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 805 transitions. [2021-06-05 14:30:42,277 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 805 transitions. Word has length 18 [2021-06-05 14:30:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:42,277 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 805 transitions. [2021-06-05 14:30:42,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 805 transitions. [2021-06-05 14:30:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:42,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:42,278 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:42,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:42,493 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2122286202, now seen corresponding path program 32 times [2021-06-05 14:30:42,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:42,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301599159] [2021-06-05 14:30:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:42,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:42,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301599159] [2021-06-05 14:30:42,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301599159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:42,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674241433] [2021-06-05 14:30:42,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:42,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:42,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:42,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:42,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:42,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674241433] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:42,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:42,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-06-05 14:30:42,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669661432] [2021-06-05 14:30:42,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:42,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:42,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:42,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:42,647 INFO L87 Difference]: Start difference. First operand 265 states and 805 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:42,751 INFO L93 Difference]: Finished difference Result 414 states and 1209 transitions. [2021-06-05 14:30:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:42,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:42,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:42,751 INFO L225 Difference]: With dead ends: 414 [2021-06-05 14:30:42,752 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 14:30:42,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 14:30:42,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 267. [2021-06-05 14:30:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.0526315789473686) internal successors, (812), 266 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 812 transitions. [2021-06-05 14:30:42,755 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 812 transitions. Word has length 18 [2021-06-05 14:30:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:42,755 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 812 transitions. [2021-06-05 14:30:42,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 812 transitions. [2021-06-05 14:30:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:42,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:42,756 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:42,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:42,957 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1312639000, now seen corresponding path program 31 times [2021-06-05 14:30:42,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:42,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655107031] [2021-06-05 14:30:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:43,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:43,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655107031] [2021-06-05 14:30:43,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655107031] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:43,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:43,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:43,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662414332] [2021-06-05 14:30:43,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:43,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:43,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:43,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:43,007 INFO L87 Difference]: Start difference. First operand 267 states and 812 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:43,135 INFO L93 Difference]: Finished difference Result 546 states and 1555 transitions. [2021-06-05 14:30:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:43,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:43,137 INFO L225 Difference]: With dead ends: 546 [2021-06-05 14:30:43,137 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 14:30:43,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 14:30:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 284. [2021-06-05 14:30:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.088339222614841) internal successors, (874), 283 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 874 transitions. [2021-06-05 14:30:43,143 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 874 transitions. Word has length 18 [2021-06-05 14:30:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:43,143 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 874 transitions. [2021-06-05 14:30:43,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 874 transitions. [2021-06-05 14:30:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:43,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:43,144 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:43,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-06-05 14:30:43,144 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:43,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1487916058, now seen corresponding path program 33 times [2021-06-05 14:30:43,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:43,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692271665] [2021-06-05 14:30:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:43,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:43,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692271665] [2021-06-05 14:30:43,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692271665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:43,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419526577] [2021-06-05 14:30:43,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:43,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:43,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:43,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:43,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:43,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419526577] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:43,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:43,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 14:30:43,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073818140] [2021-06-05 14:30:43,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:43,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:43,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:43,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:43,331 INFO L87 Difference]: Start difference. First operand 284 states and 874 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:43,481 INFO L93 Difference]: Finished difference Result 500 states and 1465 transitions. [2021-06-05 14:30:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:43,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:43,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:43,482 INFO L225 Difference]: With dead ends: 500 [2021-06-05 14:30:43,482 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 14:30:43,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 14:30:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 289. [2021-06-05 14:30:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1215277777777777) internal successors, (899), 288 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 899 transitions. [2021-06-05 14:30:43,488 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 899 transitions. Word has length 18 [2021-06-05 14:30:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:43,488 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 899 transitions. [2021-06-05 14:30:43,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 899 transitions. [2021-06-05 14:30:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:43,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:43,489 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:43,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 14:30:43,711 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:43,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1313143516, now seen corresponding path program 34 times [2021-06-05 14:30:43,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:43,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147681348] [2021-06-05 14:30:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:43,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:43,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147681348] [2021-06-05 14:30:43,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147681348] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:43,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:43,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:43,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304239484] [2021-06-05 14:30:43,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:43,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:43,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:43,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:43,757 INFO L87 Difference]: Start difference. First operand 289 states and 899 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:43,858 INFO L93 Difference]: Finished difference Result 486 states and 1414 transitions. [2021-06-05 14:30:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:43,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:43,859 INFO L225 Difference]: With dead ends: 486 [2021-06-05 14:30:43,859 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 14:30:43,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 14:30:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 295. [2021-06-05 14:30:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0918367346938775) internal successors, (909), 294 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-06-05 14:30:43,872 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 18 [2021-06-05 14:30:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:43,872 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-06-05 14:30:43,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-06-05 14:30:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:43,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:43,873 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:43,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-06-05 14:30:43,873 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:43,874 INFO L82 PathProgramCache]: Analyzing trace with hash -127799318, now seen corresponding path program 32 times [2021-06-05 14:30:43,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:43,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846102520] [2021-06-05 14:30:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:43,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:43,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846102520] [2021-06-05 14:30:43,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846102520] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:43,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:43,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:43,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602477798] [2021-06-05 14:30:43,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:43,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:43,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:43,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:43,923 INFO L87 Difference]: Start difference. First operand 295 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:44,024 INFO L93 Difference]: Finished difference Result 566 states and 1625 transitions. [2021-06-05 14:30:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:44,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:44,025 INFO L225 Difference]: With dead ends: 566 [2021-06-05 14:30:44,025 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 14:30:44,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:44,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 14:30:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 292. [2021-06-05 14:30:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.0962199312714778) internal successors, (901), 291 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 901 transitions. [2021-06-05 14:30:44,031 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 901 transitions. Word has length 18 [2021-06-05 14:30:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:44,031 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 901 transitions. [2021-06-05 14:30:44,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 901 transitions. [2021-06-05 14:30:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:44,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:44,032 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:44,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-06-05 14:30:44,032 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:44,032 INFO L82 PathProgramCache]: Analyzing trace with hash 127502256, now seen corresponding path program 33 times [2021-06-05 14:30:44,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:44,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447489597] [2021-06-05 14:30:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:44,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447489597] [2021-06-05 14:30:44,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447489597] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:44,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:44,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:44,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861181040] [2021-06-05 14:30:44,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:44,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:44,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:44,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:44,077 INFO L87 Difference]: Start difference. First operand 292 states and 901 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:44,220 INFO L93 Difference]: Finished difference Result 592 states and 1667 transitions. [2021-06-05 14:30:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:44,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:44,221 INFO L225 Difference]: With dead ends: 592 [2021-06-05 14:30:44,221 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 14:30:44,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 14:30:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 296. [2021-06-05 14:30:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.1016949152542375) internal successors, (915), 295 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 915 transitions. [2021-06-05 14:30:44,226 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 915 transitions. Word has length 18 [2021-06-05 14:30:44,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:44,226 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 915 transitions. [2021-06-05 14:30:44,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,226 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 915 transitions. [2021-06-05 14:30:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:44,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:44,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:44,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-06-05 14:30:44,227 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:44,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1799562216, now seen corresponding path program 34 times [2021-06-05 14:30:44,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:44,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516496773] [2021-06-05 14:30:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:44,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:44,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516496773] [2021-06-05 14:30:44,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516496773] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:44,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:44,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:44,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364435981] [2021-06-05 14:30:44,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:44,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:44,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:44,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:44,276 INFO L87 Difference]: Start difference. First operand 296 states and 915 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:44,429 INFO L93 Difference]: Finished difference Result 567 states and 1631 transitions. [2021-06-05 14:30:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:44,430 INFO L225 Difference]: With dead ends: 567 [2021-06-05 14:30:44,430 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 14:30:44,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 14:30:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 294. [2021-06-05 14:30:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.10580204778157) internal successors, (910), 293 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 910 transitions. [2021-06-05 14:30:44,436 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 910 transitions. Word has length 18 [2021-06-05 14:30:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:44,436 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 910 transitions. [2021-06-05 14:30:44,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 910 transitions. [2021-06-05 14:30:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:44,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:44,437 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:44,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-06-05 14:30:44,437 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash -736515620, now seen corresponding path program 35 times [2021-06-05 14:30:44,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:44,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310104257] [2021-06-05 14:30:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:44,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:44,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310104257] [2021-06-05 14:30:44,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310104257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:44,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868810874] [2021-06-05 14:30:44,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:44,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:44,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:44,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868810874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:44,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:44,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-06-05 14:30:44,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362074145] [2021-06-05 14:30:44,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:30:44,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:44,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:30:44,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:44,702 INFO L87 Difference]: Start difference. First operand 294 states and 910 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:45,149 INFO L93 Difference]: Finished difference Result 756 states and 2106 transitions. [2021-06-05 14:30:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:30:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:45,151 INFO L225 Difference]: With dead ends: 756 [2021-06-05 14:30:45,151 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 14:30:45,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 415.3ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:30:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 14:30:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 297. [2021-06-05 14:30:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.125) internal successors, (925), 296 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 925 transitions. [2021-06-05 14:30:45,159 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 925 transitions. Word has length 18 [2021-06-05 14:30:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:45,160 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 925 transitions. [2021-06-05 14:30:45,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,160 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 925 transitions. [2021-06-05 14:30:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:45,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:45,160 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:45,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:45,383 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:45,383 INFO L82 PathProgramCache]: Analyzing trace with hash 555826780, now seen corresponding path program 36 times [2021-06-05 14:30:45,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:45,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375328691] [2021-06-05 14:30:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:45,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:45,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375328691] [2021-06-05 14:30:45,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375328691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:45,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820273375] [2021-06-05 14:30:45,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:45,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:45,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:45,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:45,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820273375] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:45,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:45,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 14:30:45,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239284635] [2021-06-05 14:30:45,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:45,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:45,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:45,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:45,573 INFO L87 Difference]: Start difference. First operand 297 states and 925 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:45,730 INFO L93 Difference]: Finished difference Result 528 states and 1554 transitions. [2021-06-05 14:30:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:45,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:45,731 INFO L225 Difference]: With dead ends: 528 [2021-06-05 14:30:45,731 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 14:30:45,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 14:30:45,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 294. [2021-06-05 14:30:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.10580204778157) internal successors, (910), 293 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 910 transitions. [2021-06-05 14:30:45,735 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 910 transitions. Word has length 18 [2021-06-05 14:30:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:45,735 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 910 transitions. [2021-06-05 14:30:45,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:45,735 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 910 transitions. [2021-06-05 14:30:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:45,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:45,736 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:45,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 14:30:45,936 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:45,936 INFO L82 PathProgramCache]: Analyzing trace with hash -715779092, now seen corresponding path program 37 times [2021-06-05 14:30:45,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:45,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635377298] [2021-06-05 14:30:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:45,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:45,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635377298] [2021-06-05 14:30:45,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635377298] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:45,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:45,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:45,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775684295] [2021-06-05 14:30:45,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:45,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:45,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:45,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:45,990 INFO L87 Difference]: Start difference. First operand 294 states and 910 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:46,090 INFO L93 Difference]: Finished difference Result 525 states and 1502 transitions. [2021-06-05 14:30:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:46,091 INFO L225 Difference]: With dead ends: 525 [2021-06-05 14:30:46,091 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 14:30:46,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 14:30:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 298. [2021-06-05 14:30:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.111111111111111) internal successors, (924), 297 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-06-05 14:30:46,096 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-06-05 14:30:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:46,096 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-06-05 14:30:46,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,096 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-06-05 14:30:46,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:46,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:46,097 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:46,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-06-05 14:30:46,097 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:46,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:46,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1663764278, now seen corresponding path program 38 times [2021-06-05 14:30:46,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:46,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117637251] [2021-06-05 14:30:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:46,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117637251] [2021-06-05 14:30:46,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117637251] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:46,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:46,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:46,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434214557] [2021-06-05 14:30:46,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:46,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:46,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:46,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:46,153 INFO L87 Difference]: Start difference. First operand 298 states and 924 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:46,295 INFO L93 Difference]: Finished difference Result 531 states and 1503 transitions. [2021-06-05 14:30:46,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:30:46,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:46,296 INFO L225 Difference]: With dead ends: 531 [2021-06-05 14:30:46,296 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:30:46,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:30:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 296. [2021-06-05 14:30:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.1152542372881356) internal successors, (919), 295 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 919 transitions. [2021-06-05 14:30:46,301 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 919 transitions. Word has length 18 [2021-06-05 14:30:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:46,301 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 919 transitions. [2021-06-05 14:30:46,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 919 transitions. [2021-06-05 14:30:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:46,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:46,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:46,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-06-05 14:30:46,301 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash -220184744, now seen corresponding path program 35 times [2021-06-05 14:30:46,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:46,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447596944] [2021-06-05 14:30:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:46,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447596944] [2021-06-05 14:30:46,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447596944] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:46,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:46,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:46,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760181197] [2021-06-05 14:30:46,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:46,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:46,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:46,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:46,356 INFO L87 Difference]: Start difference. First operand 296 states and 919 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:46,490 INFO L93 Difference]: Finished difference Result 638 states and 1819 transitions. [2021-06-05 14:30:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:46,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:46,492 INFO L225 Difference]: With dead ends: 638 [2021-06-05 14:30:46,492 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 14:30:46,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 14:30:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 299. [2021-06-05 14:30:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.134228187919463) internal successors, (934), 298 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 934 transitions. [2021-06-05 14:30:46,498 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 934 transitions. Word has length 18 [2021-06-05 14:30:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:46,498 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 934 transitions. [2021-06-05 14:30:46,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 934 transitions. [2021-06-05 14:30:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:46,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:46,499 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:46,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-06-05 14:30:46,499 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:46,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1404153024, now seen corresponding path program 36 times [2021-06-05 14:30:46,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:46,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680012400] [2021-06-05 14:30:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:46,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680012400] [2021-06-05 14:30:46,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680012400] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:46,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:46,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:46,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671470252] [2021-06-05 14:30:46,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:46,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:46,550 INFO L87 Difference]: Start difference. First operand 299 states and 934 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:46,713 INFO L93 Difference]: Finished difference Result 599 states and 1729 transitions. [2021-06-05 14:30:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:46,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:46,714 INFO L225 Difference]: With dead ends: 599 [2021-06-05 14:30:46,714 INFO L226 Difference]: Without dead ends: 599 [2021-06-05 14:30:46,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-05 14:30:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 295. [2021-06-05 14:30:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.1054421768707483) internal successors, (913), 294 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 913 transitions. [2021-06-05 14:30:46,720 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 913 transitions. Word has length 18 [2021-06-05 14:30:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:46,720 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 913 transitions. [2021-06-05 14:30:46,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 913 transitions. [2021-06-05 14:30:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:46,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:46,721 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:46,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-06-05 14:30:46,721 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:46,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1984926374, now seen corresponding path program 37 times [2021-06-05 14:30:46,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:46,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136408115] [2021-06-05 14:30:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:46,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136408115] [2021-06-05 14:30:46,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136408115] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:46,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:46,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:46,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102812605] [2021-06-05 14:30:46,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:46,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:46,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:46,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:46,771 INFO L87 Difference]: Start difference. First operand 295 states and 913 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:46,927 INFO L93 Difference]: Finished difference Result 556 states and 1586 transitions. [2021-06-05 14:30:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:46,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:46,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:46,928 INFO L225 Difference]: With dead ends: 556 [2021-06-05 14:30:46,928 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 14:30:46,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 14:30:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 303. [2021-06-05 14:30:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.109271523178808) internal successors, (939), 302 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 939 transitions. [2021-06-05 14:30:46,934 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 939 transitions. Word has length 18 [2021-06-05 14:30:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:46,934 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 939 transitions. [2021-06-05 14:30:46,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 939 transitions. [2021-06-05 14:30:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:46,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:46,935 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:46,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-06-05 14:30:46,935 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:46,936 INFO L82 PathProgramCache]: Analyzing trace with hash 382976450, now seen corresponding path program 38 times [2021-06-05 14:30:46,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:46,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361151729] [2021-06-05 14:30:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:46,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:46,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361151729] [2021-06-05 14:30:46,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361151729] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:46,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:46,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:46,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727066197] [2021-06-05 14:30:46,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:46,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:46,992 INFO L87 Difference]: Start difference. First operand 303 states and 939 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:47,130 INFO L93 Difference]: Finished difference Result 555 states and 1591 transitions. [2021-06-05 14:30:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:47,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:47,131 INFO L225 Difference]: With dead ends: 555 [2021-06-05 14:30:47,131 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 14:30:47,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:47,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 14:30:47,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 299. [2021-06-05 14:30:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.1040268456375837) internal successors, (925), 298 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 925 transitions. [2021-06-05 14:30:47,135 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 925 transitions. Word has length 18 [2021-06-05 14:30:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:47,135 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 925 transitions. [2021-06-05 14:30:47,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 925 transitions. [2021-06-05 14:30:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:47,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:47,136 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:47,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-06-05 14:30:47,136 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:47,136 INFO L82 PathProgramCache]: Analyzing trace with hash -2139163544, now seen corresponding path program 39 times [2021-06-05 14:30:47,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:47,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991839740] [2021-06-05 14:30:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:47,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:47,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991839740] [2021-06-05 14:30:47,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991839740] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:47,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:47,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:47,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420429722] [2021-06-05 14:30:47,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:47,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:47,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:47,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:47,174 INFO L87 Difference]: Start difference. First operand 299 states and 925 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:47,293 INFO L93 Difference]: Finished difference Result 571 states and 1638 transitions. [2021-06-05 14:30:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:47,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:47,294 INFO L225 Difference]: With dead ends: 571 [2021-06-05 14:30:47,294 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 14:30:47,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:47,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 14:30:47,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 297. [2021-06-05 14:30:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.108108108108108) internal successors, (920), 296 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 920 transitions. [2021-06-05 14:30:47,298 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 920 transitions. Word has length 18 [2021-06-05 14:30:47,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:47,298 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 920 transitions. [2021-06-05 14:30:47,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,299 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 920 transitions. [2021-06-05 14:30:47,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:47,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:47,299 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:47,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-06-05 14:30:47,299 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1023537320, now seen corresponding path program 39 times [2021-06-05 14:30:47,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:47,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058732741] [2021-06-05 14:30:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:47,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:47,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058732741] [2021-06-05 14:30:47,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058732741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:47,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110311658] [2021-06-05 14:30:47,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:47,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:47,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:47,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:47,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110311658] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:47,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:47,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 14:30:47,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099510109] [2021-06-05 14:30:47,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:47,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:47,475 INFO L87 Difference]: Start difference. First operand 297 states and 920 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:47,592 INFO L93 Difference]: Finished difference Result 521 states and 1542 transitions. [2021-06-05 14:30:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:47,593 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:30:47,593 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 14:30:47,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 14:30:47,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 298. [2021-06-05 14:30:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.1043771043771042) internal successors, (922), 297 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 922 transitions. [2021-06-05 14:30:47,597 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 922 transitions. Word has length 18 [2021-06-05 14:30:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:47,597 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 922 transitions. [2021-06-05 14:30:47,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 922 transitions. [2021-06-05 14:30:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:47,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:47,597 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:47,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 14:30:47,798 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:47,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1979087576, now seen corresponding path program 40 times [2021-06-05 14:30:47,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:47,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838676667] [2021-06-05 14:30:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:47,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838676667] [2021-06-05 14:30:47,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838676667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223124602] [2021-06-05 14:30:47,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:47,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:47,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:47,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:47,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:47,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223124602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:47,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:47,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:30:47,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556769213] [2021-06-05 14:30:47,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:47,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:47,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:47,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:47,963 INFO L87 Difference]: Start difference. First operand 298 states and 922 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:48,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:48,207 INFO L93 Difference]: Finished difference Result 640 states and 1839 transitions. [2021-06-05 14:30:48,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:30:48,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:48,208 INFO L225 Difference]: With dead ends: 640 [2021-06-05 14:30:48,208 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 14:30:48,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 14:30:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 287. [2021-06-05 14:30:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0944055944055946) internal successors, (885), 286 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 885 transitions. [2021-06-05 14:30:48,214 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 885 transitions. Word has length 18 [2021-06-05 14:30:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:48,214 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 885 transitions. [2021-06-05 14:30:48,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 885 transitions. [2021-06-05 14:30:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:48,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:48,215 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:48,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:48,439 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:48,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1938415430, now seen corresponding path program 41 times [2021-06-05 14:30:48,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:48,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099300847] [2021-06-05 14:30:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:48,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099300847] [2021-06-05 14:30:48,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099300847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971248572] [2021-06-05 14:30:48,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:48,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:48,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:48,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:48,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971248572] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:48,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:48,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 14:30:48,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386297982] [2021-06-05 14:30:48,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:48,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:48,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:48,638 INFO L87 Difference]: Start difference. First operand 287 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:48,755 INFO L93 Difference]: Finished difference Result 511 states and 1498 transitions. [2021-06-05 14:30:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:48,755 INFO L225 Difference]: With dead ends: 511 [2021-06-05 14:30:48,755 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 14:30:48,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 14:30:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 284. [2021-06-05 14:30:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0848056537102475) internal successors, (873), 283 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:48,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 873 transitions. [2021-06-05 14:30:48,759 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 873 transitions. Word has length 18 [2021-06-05 14:30:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:48,759 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 873 transitions. [2021-06-05 14:30:48,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 873 transitions. [2021-06-05 14:30:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:48,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:48,760 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:48,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 14:30:48,960 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:48,961 INFO L82 PathProgramCache]: Analyzing trace with hash -223183330, now seen corresponding path program 42 times [2021-06-05 14:30:48,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:48,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454465256] [2021-06-05 14:30:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:49,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:49,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454465256] [2021-06-05 14:30:49,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454465256] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:49,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:49,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:49,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107126493] [2021-06-05 14:30:49,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:49,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:49,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:49,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:49,010 INFO L87 Difference]: Start difference. First operand 284 states and 873 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:49,097 INFO L93 Difference]: Finished difference Result 422 states and 1234 transitions. [2021-06-05 14:30:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:49,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:49,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:49,098 INFO L225 Difference]: With dead ends: 422 [2021-06-05 14:30:49,098 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 14:30:49,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 14:30:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 298. [2021-06-05 14:30:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0707070707070705) internal successors, (912), 297 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 912 transitions. [2021-06-05 14:30:49,101 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 912 transitions. Word has length 18 [2021-06-05 14:30:49,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:49,101 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 912 transitions. [2021-06-05 14:30:49,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 912 transitions. [2021-06-05 14:30:49,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:49,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:49,102 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:49,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-06-05 14:30:49,102 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2138607256, now seen corresponding path program 43 times [2021-06-05 14:30:49,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:49,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935444313] [2021-06-05 14:30:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:49,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:49,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935444313] [2021-06-05 14:30:49,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935444313] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:49,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:49,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:49,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231457265] [2021-06-05 14:30:49,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:49,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:49,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:49,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:49,150 INFO L87 Difference]: Start difference. First operand 298 states and 912 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:49,251 INFO L93 Difference]: Finished difference Result 462 states and 1340 transitions. [2021-06-05 14:30:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:49,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:49,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:49,252 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:30:49,252 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 14:30:49,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 14:30:49,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 296. [2021-06-05 14:30:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.074576271186441) internal successors, (907), 295 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 907 transitions. [2021-06-05 14:30:49,257 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 907 transitions. Word has length 18 [2021-06-05 14:30:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:49,257 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 907 transitions. [2021-06-05 14:30:49,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 907 transitions. [2021-06-05 14:30:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:49,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:49,258 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:49,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-06-05 14:30:49,258 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:49,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash 827662620, now seen corresponding path program 44 times [2021-06-05 14:30:49,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:49,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916610443] [2021-06-05 14:30:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:49,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:49,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916610443] [2021-06-05 14:30:49,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916610443] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:49,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:49,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:49,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686005902] [2021-06-05 14:30:49,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:49,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:49,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:49,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:49,307 INFO L87 Difference]: Start difference. First operand 296 states and 907 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:49,443 INFO L93 Difference]: Finished difference Result 442 states and 1284 transitions. [2021-06-05 14:30:49,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:30:49,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:49,444 INFO L225 Difference]: With dead ends: 442 [2021-06-05 14:30:49,444 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 14:30:49,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 14:30:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 286. [2021-06-05 14:30:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.0807017543859647) internal successors, (878), 285 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 878 transitions. [2021-06-05 14:30:49,448 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 878 transitions. Word has length 18 [2021-06-05 14:30:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:49,448 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 878 transitions. [2021-06-05 14:30:49,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,448 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 878 transitions. [2021-06-05 14:30:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:49,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:49,448 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:49,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-06-05 14:30:49,449 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash -150074708, now seen corresponding path program 40 times [2021-06-05 14:30:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:49,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479500990] [2021-06-05 14:30:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:49,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:49,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479500990] [2021-06-05 14:30:49,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479500990] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:49,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:49,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:49,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965817155] [2021-06-05 14:30:49,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:49,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:49,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:49,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:49,495 INFO L87 Difference]: Start difference. First operand 286 states and 878 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:49,622 INFO L93 Difference]: Finished difference Result 508 states and 1470 transitions. [2021-06-05 14:30:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:49,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:49,623 INFO L225 Difference]: With dead ends: 508 [2021-06-05 14:30:49,623 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:30:49,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:49,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:30:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 287. [2021-06-05 14:30:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.076923076923077) internal successors, (880), 286 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 880 transitions. [2021-06-05 14:30:49,627 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 880 transitions. Word has length 18 [2021-06-05 14:30:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:49,627 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 880 transitions. [2021-06-05 14:30:49,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 880 transitions. [2021-06-05 14:30:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:49,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:49,628 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:49,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-06-05 14:30:49,628 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:49,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1474263060, now seen corresponding path program 41 times [2021-06-05 14:30:49,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:49,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004586687] [2021-06-05 14:30:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:49,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:49,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004586687] [2021-06-05 14:30:49,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004586687] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:49,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:49,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:49,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173124063] [2021-06-05 14:30:49,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:49,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:49,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:49,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:49,673 INFO L87 Difference]: Start difference. First operand 287 states and 880 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:49,807 INFO L93 Difference]: Finished difference Result 511 states and 1476 transitions. [2021-06-05 14:30:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:49,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:49,808 INFO L225 Difference]: With dead ends: 511 [2021-06-05 14:30:49,808 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 14:30:49,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 14:30:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 284. [2021-06-05 14:30:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.056537102473498) internal successors, (865), 283 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 865 transitions. [2021-06-05 14:30:49,811 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 865 transitions. Word has length 18 [2021-06-05 14:30:49,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:49,812 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 865 transitions. [2021-06-05 14:30:49,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 865 transitions. [2021-06-05 14:30:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:49,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:49,812 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:49,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-06-05 14:30:49,812 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1780468438, now seen corresponding path program 42 times [2021-06-05 14:30:49,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:49,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618802332] [2021-06-05 14:30:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:49,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:49,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618802332] [2021-06-05 14:30:49,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618802332] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:49,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:49,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:49,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631963889] [2021-06-05 14:30:49,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:49,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:49,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:49,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:49,855 INFO L87 Difference]: Start difference. First operand 284 states and 865 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:49,974 INFO L93 Difference]: Finished difference Result 502 states and 1444 transitions. [2021-06-05 14:30:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:49,975 INFO L225 Difference]: With dead ends: 502 [2021-06-05 14:30:49,975 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 14:30:49,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:49,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 14:30:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 273. [2021-06-05 14:30:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0661764705882355) internal successors, (834), 272 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 834 transitions. [2021-06-05 14:30:49,979 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 834 transitions. Word has length 18 [2021-06-05 14:30:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:49,979 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 834 transitions. [2021-06-05 14:30:49,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 834 transitions. [2021-06-05 14:30:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:49,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:49,979 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:49,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-06-05 14:30:49,979 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:49,979 INFO L82 PathProgramCache]: Analyzing trace with hash -388587486, now seen corresponding path program 43 times [2021-06-05 14:30:49,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:49,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228173162] [2021-06-05 14:30:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:50,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:50,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228173162] [2021-06-05 14:30:50,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228173162] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:50,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:50,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854713331] [2021-06-05 14:30:50,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:50,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:50,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:50,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:50,019 INFO L87 Difference]: Start difference. First operand 273 states and 834 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:50,144 INFO L93 Difference]: Finished difference Result 421 states and 1245 transitions. [2021-06-05 14:30:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:50,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:50,145 INFO L225 Difference]: With dead ends: 421 [2021-06-05 14:30:50,145 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 14:30:50,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 14:30:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 290. [2021-06-05 14:30:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.069204152249135) internal successors, (887), 289 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 887 transitions. [2021-06-05 14:30:50,149 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 887 transitions. Word has length 18 [2021-06-05 14:30:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:50,149 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 887 transitions. [2021-06-05 14:30:50,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 887 transitions. [2021-06-05 14:30:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:50,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:50,149 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:50,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-06-05 14:30:50,149 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:50,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1829025804, now seen corresponding path program 44 times [2021-06-05 14:30:50,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:50,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195978949] [2021-06-05 14:30:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:50,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:50,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195978949] [2021-06-05 14:30:50,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195978949] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:50,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:50,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:50,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18758738] [2021-06-05 14:30:50,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:50,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:50,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:50,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:50,196 INFO L87 Difference]: Start difference. First operand 290 states and 887 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:50,321 INFO L93 Difference]: Finished difference Result 423 states and 1258 transitions. [2021-06-05 14:30:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:50,340 INFO L225 Difference]: With dead ends: 423 [2021-06-05 14:30:50,340 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 14:30:50,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 14:30:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 287. [2021-06-05 14:30:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0734265734265733) internal successors, (879), 286 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 879 transitions. [2021-06-05 14:30:50,343 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 879 transitions. Word has length 18 [2021-06-05 14:30:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:50,343 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 879 transitions. [2021-06-05 14:30:50,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 879 transitions. [2021-06-05 14:30:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:50,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:50,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:50,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-06-05 14:30:50,344 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:50,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:50,344 INFO L82 PathProgramCache]: Analyzing trace with hash -753314648, now seen corresponding path program 45 times [2021-06-05 14:30:50,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:50,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081988642] [2021-06-05 14:30:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:50,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:50,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081988642] [2021-06-05 14:30:50,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081988642] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:50,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:50,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:50,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87442132] [2021-06-05 14:30:50,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:50,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:50,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:50,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:50,384 INFO L87 Difference]: Start difference. First operand 287 states and 879 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:50,505 INFO L93 Difference]: Finished difference Result 457 states and 1358 transitions. [2021-06-05 14:30:50,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:50,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:50,506 INFO L225 Difference]: With dead ends: 457 [2021-06-05 14:30:50,506 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:30:50,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:30:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 284. [2021-06-05 14:30:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.07773851590106) internal successors, (871), 283 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 871 transitions. [2021-06-05 14:30:50,511 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 871 transitions. Word has length 18 [2021-06-05 14:30:50,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:50,511 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 871 transitions. [2021-06-05 14:30:50,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,511 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 871 transitions. [2021-06-05 14:30:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:50,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:50,512 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:50,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-06-05 14:30:50,512 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:50,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:50,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1623768616, now seen corresponding path program 46 times [2021-06-05 14:30:50,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:50,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210847193] [2021-06-05 14:30:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:50,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:50,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210847193] [2021-06-05 14:30:50,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210847193] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:50,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:50,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:50,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667310811] [2021-06-05 14:30:50,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:50,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:50,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:50,555 INFO L87 Difference]: Start difference. First operand 284 states and 871 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:50,684 INFO L93 Difference]: Finished difference Result 519 states and 1486 transitions. [2021-06-05 14:30:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:50,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:50,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:50,685 INFO L225 Difference]: With dead ends: 519 [2021-06-05 14:30:50,685 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 14:30:50,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:50,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 14:30:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 291. [2021-06-05 14:30:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1) internal successors, (899), 290 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 899 transitions. [2021-06-05 14:30:50,692 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 899 transitions. Word has length 18 [2021-06-05 14:30:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:50,692 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 899 transitions. [2021-06-05 14:30:50,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 899 transitions. [2021-06-05 14:30:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:50,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:50,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:50,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-06-05 14:30:50,693 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash 183330298, now seen corresponding path program 47 times [2021-06-05 14:30:50,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:50,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621210775] [2021-06-05 14:30:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:50,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:50,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621210775] [2021-06-05 14:30:50,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621210775] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:50,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:50,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:50,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956897286] [2021-06-05 14:30:50,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:50,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:50,737 INFO L87 Difference]: Start difference. First operand 291 states and 899 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:50,885 INFO L93 Difference]: Finished difference Result 528 states and 1521 transitions. [2021-06-05 14:30:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:50,886 INFO L225 Difference]: With dead ends: 528 [2021-06-05 14:30:50,886 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 14:30:50,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 14:30:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 285. [2021-06-05 14:30:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0880281690140845) internal successors, (877), 284 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-06-05 14:30:50,891 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-06-05 14:30:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:50,891 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-06-05 14:30:50,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:50,892 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-06-05 14:30:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:50,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:50,892 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:50,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-06-05 14:30:50,892 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:50,893 INFO L82 PathProgramCache]: Analyzing trace with hash 438631872, now seen corresponding path program 48 times [2021-06-05 14:30:50,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:50,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934871632] [2021-06-05 14:30:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:50,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:50,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934871632] [2021-06-05 14:30:50,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934871632] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:50,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:50,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:50,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662571930] [2021-06-05 14:30:50,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:50,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:50,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:50,934 INFO L87 Difference]: Start difference. First operand 285 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:51,039 INFO L93 Difference]: Finished difference Result 476 states and 1379 transitions. [2021-06-05 14:30:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:51,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:51,040 INFO L225 Difference]: With dead ends: 476 [2021-06-05 14:30:51,040 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 14:30:51,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 14:30:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 289. [2021-06-05 14:30:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.09375) internal successors, (891), 288 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 891 transitions. [2021-06-05 14:30:51,044 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 891 transitions. Word has length 18 [2021-06-05 14:30:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:51,044 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 891 transitions. [2021-06-05 14:30:51,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 891 transitions. [2021-06-05 14:30:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:51,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:51,044 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:51,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-06-05 14:30:51,044 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1488432600, now seen corresponding path program 49 times [2021-06-05 14:30:51,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:51,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858327066] [2021-06-05 14:30:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:51,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:51,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858327066] [2021-06-05 14:30:51,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858327066] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:51,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:51,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:51,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375382410] [2021-06-05 14:30:51,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:51,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:51,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:51,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:51,085 INFO L87 Difference]: Start difference. First operand 289 states and 891 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:51,183 INFO L93 Difference]: Finished difference Result 451 states and 1343 transitions. [2021-06-05 14:30:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:51,184 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:30:51,184 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:30:51,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:30:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 287. [2021-06-05 14:30:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.097902097902098) internal successors, (886), 286 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 886 transitions. [2021-06-05 14:30:51,187 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 886 transitions. Word has length 18 [2021-06-05 14:30:51,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:51,187 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 886 transitions. [2021-06-05 14:30:51,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 886 transitions. [2021-06-05 14:30:51,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:51,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:51,188 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:51,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-06-05 14:30:51,188 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash 90944872, now seen corresponding path program 50 times [2021-06-05 14:30:51,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:51,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171250526] [2021-06-05 14:30:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:51,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:51,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171250526] [2021-06-05 14:30:51,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171250526] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:51,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:51,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:51,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275151886] [2021-06-05 14:30:51,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:51,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:51,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:51,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:51,234 INFO L87 Difference]: Start difference. First operand 287 states and 886 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:51,361 INFO L93 Difference]: Finished difference Result 511 states and 1492 transitions. [2021-06-05 14:30:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:51,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:51,362 INFO L225 Difference]: With dead ends: 511 [2021-06-05 14:30:51,362 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 14:30:51,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 14:30:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 290. [2021-06-05 14:30:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.1176470588235294) internal successors, (901), 289 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 901 transitions. [2021-06-05 14:30:51,367 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 901 transitions. Word has length 18 [2021-06-05 14:30:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:51,367 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 901 transitions. [2021-06-05 14:30:51,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,367 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 901 transitions. [2021-06-05 14:30:51,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:51,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:51,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:51,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-06-05 14:30:51,368 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1715282640, now seen corresponding path program 51 times [2021-06-05 14:30:51,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:51,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947938863] [2021-06-05 14:30:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:51,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:51,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947938863] [2021-06-05 14:30:51,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947938863] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:51,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:51,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:51,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471555418] [2021-06-05 14:30:51,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:51,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:51,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:51,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:51,415 INFO L87 Difference]: Start difference. First operand 290 states and 901 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:51,530 INFO L93 Difference]: Finished difference Result 475 states and 1412 transitions. [2021-06-05 14:30:51,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:51,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:51,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:51,531 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:30:51,531 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:30:51,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:30:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 286. [2021-06-05 14:30:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.087719298245614) internal successors, (880), 285 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 880 transitions. [2021-06-05 14:30:51,535 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 880 transitions. Word has length 18 [2021-06-05 14:30:51,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:51,535 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 880 transitions. [2021-06-05 14:30:51,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,535 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 880 transitions. [2021-06-05 14:30:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:51,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:51,536 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:51,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-06-05 14:30:51,536 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:51,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:51,536 INFO L82 PathProgramCache]: Analyzing trace with hash 677704442, now seen corresponding path program 52 times [2021-06-05 14:30:51,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:51,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541657768] [2021-06-05 14:30:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:51,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:51,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541657768] [2021-06-05 14:30:51,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541657768] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:51,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:51,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:51,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880301421] [2021-06-05 14:30:51,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:51,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:51,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:51,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:51,574 INFO L87 Difference]: Start difference. First operand 286 states and 880 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:51,689 INFO L93 Difference]: Finished difference Result 553 states and 1642 transitions. [2021-06-05 14:30:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:51,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:51,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:51,690 INFO L225 Difference]: With dead ends: 553 [2021-06-05 14:30:51,690 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 14:30:51,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 14:30:51,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-06-05 14:30:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.0972222222222223) internal successors, (892), 288 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 892 transitions. [2021-06-05 14:30:51,694 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 892 transitions. Word has length 18 [2021-06-05 14:30:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:51,694 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 892 transitions. [2021-06-05 14:30:51,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 892 transitions. [2021-06-05 14:30:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:51,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:51,695 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:51,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-06-05 14:30:51,695 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:51,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1850997812, now seen corresponding path program 53 times [2021-06-05 14:30:51,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:51,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718742898] [2021-06-05 14:30:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:51,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:51,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718742898] [2021-06-05 14:30:51,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718742898] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:51,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:51,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:51,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946733526] [2021-06-05 14:30:51,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:51,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:51,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:51,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:51,747 INFO L87 Difference]: Start difference. First operand 289 states and 892 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:51,871 INFO L93 Difference]: Finished difference Result 531 states and 1576 transitions. [2021-06-05 14:30:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:51,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:51,872 INFO L225 Difference]: With dead ends: 531 [2021-06-05 14:30:51,872 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:30:51,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:30:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 292. [2021-06-05 14:30:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.1168384879725086) internal successors, (907), 291 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 907 transitions. [2021-06-05 14:30:51,876 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 907 transitions. Word has length 18 [2021-06-05 14:30:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:51,876 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 907 transitions. [2021-06-05 14:30:51,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:51,876 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 907 transitions. [2021-06-05 14:30:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:51,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:51,877 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:51,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-06-05 14:30:51,877 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash -819631716, now seen corresponding path program 54 times [2021-06-05 14:30:51,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:51,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450032546] [2021-06-05 14:30:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:51,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:51,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450032546] [2021-06-05 14:30:51,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450032546] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:51,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:51,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:51,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577781848] [2021-06-05 14:30:51,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:51,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:51,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:51,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:51,920 INFO L87 Difference]: Start difference. First operand 292 states and 907 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:52,039 INFO L93 Difference]: Finished difference Result 489 states and 1481 transitions. [2021-06-05 14:30:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:52,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:52,040 INFO L225 Difference]: With dead ends: 489 [2021-06-05 14:30:52,040 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 14:30:52,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 14:30:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 285. [2021-06-05 14:30:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0809859154929575) internal successors, (875), 284 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 875 transitions. [2021-06-05 14:30:52,043 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 875 transitions. Word has length 18 [2021-06-05 14:30:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:52,043 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 875 transitions. [2021-06-05 14:30:52,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 875 transitions. [2021-06-05 14:30:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:52,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:52,044 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:52,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-06-05 14:30:52,044 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:52,044 INFO L82 PathProgramCache]: Analyzing trace with hash 775146144, now seen corresponding path program 55 times [2021-06-05 14:30:52,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:52,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457282398] [2021-06-05 14:30:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:52,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457282398] [2021-06-05 14:30:52,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457282398] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:52,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:52,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:52,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055250515] [2021-06-05 14:30:52,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:52,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:52,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:52,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:52,087 INFO L87 Difference]: Start difference. First operand 285 states and 875 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:52,178 INFO L93 Difference]: Finished difference Result 471 states and 1374 transitions. [2021-06-05 14:30:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:52,179 INFO L225 Difference]: With dead ends: 471 [2021-06-05 14:30:52,179 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 14:30:52,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 14:30:52,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 294. [2021-06-05 14:30:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.1296928327645053) internal successors, (917), 293 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 917 transitions. [2021-06-05 14:30:52,188 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 917 transitions. Word has length 18 [2021-06-05 14:30:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:52,188 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 917 transitions. [2021-06-05 14:30:52,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 917 transitions. [2021-06-05 14:30:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:52,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:52,189 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:52,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-06-05 14:30:52,189 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:52,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:52,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2025408914, now seen corresponding path program 45 times [2021-06-05 14:30:52,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:52,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951979228] [2021-06-05 14:30:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:52,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951979228] [2021-06-05 14:30:52,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951979228] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:52,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:52,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:52,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822970064] [2021-06-05 14:30:52,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:52,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:52,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:52,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:52,238 INFO L87 Difference]: Start difference. First operand 294 states and 917 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:52,341 INFO L93 Difference]: Finished difference Result 540 states and 1577 transitions. [2021-06-05 14:30:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:52,342 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:30:52,343 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:30:52,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:52,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:30:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 299. [2021-06-05 14:30:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.161073825503356) internal successors, (942), 298 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 942 transitions. [2021-06-05 14:30:52,349 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 942 transitions. Word has length 18 [2021-06-05 14:30:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:52,349 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 942 transitions. [2021-06-05 14:30:52,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 942 transitions. [2021-06-05 14:30:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:52,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:52,350 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:52,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-06-05 14:30:52,350 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:52,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:52,350 INFO L82 PathProgramCache]: Analyzing trace with hash 775650660, now seen corresponding path program 46 times [2021-06-05 14:30:52,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:52,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622472230] [2021-06-05 14:30:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:52,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622472230] [2021-06-05 14:30:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622472230] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:52,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:52,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:52,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106123738] [2021-06-05 14:30:52,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:52,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:52,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:52,401 INFO L87 Difference]: Start difference. First operand 299 states and 942 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:52,519 INFO L93 Difference]: Finished difference Result 539 states and 1563 transitions. [2021-06-05 14:30:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:52,520 INFO L225 Difference]: With dead ends: 539 [2021-06-05 14:30:52,520 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 14:30:52,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 14:30:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 305. [2021-06-05 14:30:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1315789473684212) internal successors, (952), 304 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 952 transitions. [2021-06-05 14:30:52,526 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 952 transitions. Word has length 18 [2021-06-05 14:30:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:52,527 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 952 transitions. [2021-06-05 14:30:52,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,528 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 952 transitions. [2021-06-05 14:30:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:52,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:52,528 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:52,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-06-05 14:30:52,528 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:52,529 INFO L82 PathProgramCache]: Analyzing trace with hash -665292174, now seen corresponding path program 56 times [2021-06-05 14:30:52,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:52,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351644078] [2021-06-05 14:30:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:52,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351644078] [2021-06-05 14:30:52,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351644078] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:52,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:52,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:52,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949632899] [2021-06-05 14:30:52,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:52,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:52,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:52,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:52,573 INFO L87 Difference]: Start difference. First operand 305 states and 952 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:52,704 INFO L93 Difference]: Finished difference Result 491 states and 1444 transitions. [2021-06-05 14:30:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:52,705 INFO L225 Difference]: With dead ends: 491 [2021-06-05 14:30:52,705 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 14:30:52,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:52,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 14:30:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 299. [2021-06-05 14:30:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-06-05 14:30:52,710 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-06-05 14:30:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:52,710 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-06-05 14:30:52,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-06-05 14:30:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:52,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:52,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:52,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-06-05 14:30:52,711 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:52,711 INFO L82 PathProgramCache]: Analyzing trace with hash -409990600, now seen corresponding path program 57 times [2021-06-05 14:30:52,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:52,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628266211] [2021-06-05 14:30:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:52,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628266211] [2021-06-05 14:30:52,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628266211] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:52,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:52,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:52,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323591364] [2021-06-05 14:30:52,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:52,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:52,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:52,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:52,758 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:52,896 INFO L93 Difference]: Finished difference Result 517 states and 1486 transitions. [2021-06-05 14:30:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:52,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:52,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:52,897 INFO L225 Difference]: With dead ends: 517 [2021-06-05 14:30:52,897 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 14:30:52,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 14:30:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 303. [2021-06-05 14:30:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.1258278145695364) internal successors, (944), 302 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 944 transitions. [2021-06-05 14:30:52,901 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 944 transitions. Word has length 18 [2021-06-05 14:30:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:52,901 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 944 transitions. [2021-06-05 14:30:52,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 944 transitions. [2021-06-05 14:30:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:52,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:52,902 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:52,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-06-05 14:30:52,902 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:52,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1957912224, now seen corresponding path program 58 times [2021-06-05 14:30:52,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:52,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702427019] [2021-06-05 14:30:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:52,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:52,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702427019] [2021-06-05 14:30:52,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702427019] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:52,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:52,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:52,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582607422] [2021-06-05 14:30:52,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:52,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:52,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:52,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:52,961 INFO L87 Difference]: Start difference. First operand 303 states and 944 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:53,122 INFO L93 Difference]: Finished difference Result 492 states and 1450 transitions. [2021-06-05 14:30:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:53,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:53,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:53,124 INFO L225 Difference]: With dead ends: 492 [2021-06-05 14:30:53,124 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 14:30:53,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 14:30:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 299. [2021-06-05 14:30:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-06-05 14:30:53,129 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-06-05 14:30:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:53,129 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-06-05 14:30:53,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-06-05 14:30:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:53,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:53,129 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:53,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-06-05 14:30:53,130 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:53,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1274008476, now seen corresponding path program 47 times [2021-06-05 14:30:53,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:53,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223785521] [2021-06-05 14:30:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:53,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:53,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223785521] [2021-06-05 14:30:53,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223785521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:53,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347524341] [2021-06-05 14:30:53,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:53,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:53,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:53,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:53,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:53,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347524341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:53,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:53,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:30:53,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249949433] [2021-06-05 14:30:53,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:53,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:53,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:53,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:53,301 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:53,556 INFO L93 Difference]: Finished difference Result 604 states and 1726 transitions. [2021-06-05 14:30:53,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:53,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:53,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:53,557 INFO L225 Difference]: With dead ends: 604 [2021-06-05 14:30:53,557 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 14:30:53,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:30:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 14:30:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 302. [2021-06-05 14:30:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.13953488372093) internal successors, (945), 301 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 945 transitions. [2021-06-05 14:30:53,563 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 945 transitions. Word has length 18 [2021-06-05 14:30:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:53,563 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 945 transitions. [2021-06-05 14:30:53,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 945 transitions. [2021-06-05 14:30:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:53,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:53,564 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:53,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:53,764 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:53,764 INFO L82 PathProgramCache]: Analyzing trace with hash 18333924, now seen corresponding path program 48 times [2021-06-05 14:30:53,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:53,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678864863] [2021-06-05 14:30:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:53,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:53,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678864863] [2021-06-05 14:30:53,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678864863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:53,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031029919] [2021-06-05 14:30:53,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:53,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:30:53,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:53,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:53,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:53,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031029919] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:53,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:53,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 14:30:53,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914113930] [2021-06-05 14:30:53,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:53,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:53,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:53,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:53,957 INFO L87 Difference]: Start difference. First operand 302 states and 945 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:54,115 INFO L93 Difference]: Finished difference Result 560 states and 1629 transitions. [2021-06-05 14:30:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:54,116 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:30:54,116 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 14:30:54,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 14:30:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 299. [2021-06-05 14:30:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-06-05 14:30:54,120 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-06-05 14:30:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:54,120 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-06-05 14:30:54,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-06-05 14:30:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:54,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:54,121 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:54,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:54,321 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1253271948, now seen corresponding path program 49 times [2021-06-05 14:30:54,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:54,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275713294] [2021-06-05 14:30:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:54,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:54,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275713294] [2021-06-05 14:30:54,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275713294] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:54,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:54,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:54,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058652733] [2021-06-05 14:30:54,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:54,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:54,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:54,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:54,371 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:54,473 INFO L93 Difference]: Finished difference Result 578 states and 1648 transitions. [2021-06-05 14:30:54,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:54,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:54,474 INFO L225 Difference]: With dead ends: 578 [2021-06-05 14:30:54,474 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 14:30:54,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 14:30:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 303. [2021-06-05 14:30:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.1258278145695364) internal successors, (944), 302 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 944 transitions. [2021-06-05 14:30:54,478 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 944 transitions. Word has length 18 [2021-06-05 14:30:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:54,478 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 944 transitions. [2021-06-05 14:30:54,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 944 transitions. [2021-06-05 14:30:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:54,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:54,479 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:54,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-06-05 14:30:54,479 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1126271422, now seen corresponding path program 50 times [2021-06-05 14:30:54,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:54,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010132341] [2021-06-05 14:30:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:54,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:54,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010132341] [2021-06-05 14:30:54,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010132341] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:54,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:54,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:54,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616247845] [2021-06-05 14:30:54,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:54,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:54,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:54,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:54,531 INFO L87 Difference]: Start difference. First operand 303 states and 944 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:54,681 INFO L93 Difference]: Finished difference Result 436 states and 1296 transitions. [2021-06-05 14:30:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:30:54,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:54,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:54,682 INFO L225 Difference]: With dead ends: 436 [2021-06-05 14:30:54,682 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 14:30:54,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 14:30:54,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 301. [2021-06-05 14:30:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.13) internal successors, (939), 300 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 939 transitions. [2021-06-05 14:30:54,686 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 939 transitions. Word has length 18 [2021-06-05 14:30:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:54,686 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 939 transitions. [2021-06-05 14:30:54,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 939 transitions. [2021-06-05 14:30:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:54,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:54,686 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:54,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-06-05 14:30:54,686 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:54,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:54,687 INFO L82 PathProgramCache]: Analyzing trace with hash -757677600, now seen corresponding path program 59 times [2021-06-05 14:30:54,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:54,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316660476] [2021-06-05 14:30:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:54,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:54,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316660476] [2021-06-05 14:30:54,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316660476] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:54,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:54,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:54,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788941050] [2021-06-05 14:30:54,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:54,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:54,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:54,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:54,729 INFO L87 Difference]: Start difference. First operand 301 states and 939 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:54,841 INFO L93 Difference]: Finished difference Result 565 states and 1643 transitions. [2021-06-05 14:30:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:54,842 INFO L225 Difference]: With dead ends: 565 [2021-06-05 14:30:54,842 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 14:30:54,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 14:30:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 304. [2021-06-05 14:30:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.1485148514851486) internal successors, (954), 303 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 954 transitions. [2021-06-05 14:30:54,847 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 954 transitions. Word has length 18 [2021-06-05 14:30:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:54,847 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 954 transitions. [2021-06-05 14:30:54,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 954 transitions. [2021-06-05 14:30:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:54,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:54,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:54,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-06-05 14:30:54,847 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash 866660168, now seen corresponding path program 60 times [2021-06-05 14:30:54,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:54,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687594614] [2021-06-05 14:30:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:54,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:54,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687594614] [2021-06-05 14:30:54,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687594614] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:54,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:54,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:54,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178045466] [2021-06-05 14:30:54,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:54,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:54,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:54,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:54,888 INFO L87 Difference]: Start difference. First operand 304 states and 954 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:55,015 INFO L93 Difference]: Finished difference Result 526 states and 1553 transitions. [2021-06-05 14:30:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:55,016 INFO L225 Difference]: With dead ends: 526 [2021-06-05 14:30:55,017 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 14:30:55,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 14:30:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 299. [2021-06-05 14:30:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.110738255033557) internal successors, (927), 298 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 927 transitions. [2021-06-05 14:30:55,020 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 927 transitions. Word has length 18 [2021-06-05 14:30:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:55,020 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 927 transitions. [2021-06-05 14:30:55,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 927 transitions. [2021-06-05 14:30:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:55,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:55,021 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:55,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-06-05 14:30:55,021 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:55,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1772548066, now seen corresponding path program 61 times [2021-06-05 14:30:55,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:55,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255201866] [2021-06-05 14:30:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:55,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:55,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255201866] [2021-06-05 14:30:55,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255201866] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:55,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:55,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:55,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836060872] [2021-06-05 14:30:55,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:55,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:55,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:55,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:55,056 INFO L87 Difference]: Start difference. First operand 299 states and 927 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:55,174 INFO L93 Difference]: Finished difference Result 429 states and 1270 transitions. [2021-06-05 14:30:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:55,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:55,175 INFO L225 Difference]: With dead ends: 429 [2021-06-05 14:30:55,175 INFO L226 Difference]: Without dead ends: 422 [2021-06-05 14:30:55,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:55,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-05 14:30:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 305. [2021-06-05 14:30:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1184210526315788) internal successors, (948), 304 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 948 transitions. [2021-06-05 14:30:55,179 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 948 transitions. Word has length 18 [2021-06-05 14:30:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:55,179 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 948 transitions. [2021-06-05 14:30:55,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 948 transitions. [2021-06-05 14:30:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:55,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:55,179 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:55,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-06-05 14:30:55,179 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash -154516406, now seen corresponding path program 62 times [2021-06-05 14:30:55,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:55,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803616022] [2021-06-05 14:30:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:55,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:55,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803616022] [2021-06-05 14:30:55,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803616022] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:55,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:55,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:55,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261067198] [2021-06-05 14:30:55,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:55,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:55,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:55,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:55,226 INFO L87 Difference]: Start difference. First operand 305 states and 948 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:55,364 INFO L93 Difference]: Finished difference Result 428 states and 1275 transitions. [2021-06-05 14:30:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:55,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:55,364 INFO L225 Difference]: With dead ends: 428 [2021-06-05 14:30:55,364 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 14:30:55,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 14:30:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 301. [2021-06-05 14:30:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.1133333333333333) internal successors, (934), 300 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 934 transitions. [2021-06-05 14:30:55,368 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 934 transitions. Word has length 18 [2021-06-05 14:30:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:55,368 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 934 transitions. [2021-06-05 14:30:55,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 934 transitions. [2021-06-05 14:30:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:55,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:55,369 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:55,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-06-05 14:30:55,369 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1618310896, now seen corresponding path program 63 times [2021-06-05 14:30:55,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:55,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885408588] [2021-06-05 14:30:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:55,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:55,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885408588] [2021-06-05 14:30:55,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885408588] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:55,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:55,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:55,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429940217] [2021-06-05 14:30:55,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:55,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:55,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:55,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:55,425 INFO L87 Difference]: Start difference. First operand 301 states and 934 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:55,550 INFO L93 Difference]: Finished difference Result 444 states and 1322 transitions. [2021-06-05 14:30:55,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:55,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:55,551 INFO L225 Difference]: With dead ends: 444 [2021-06-05 14:30:55,551 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 14:30:55,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 14:30:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 299. [2021-06-05 14:30:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.11744966442953) internal successors, (929), 298 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 929 transitions. [2021-06-05 14:30:55,554 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 929 transitions. Word has length 18 [2021-06-05 14:30:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:55,554 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 929 transitions. [2021-06-05 14:30:55,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 929 transitions. [2021-06-05 14:30:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:55,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:55,555 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:55,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-06-05 14:30:55,555 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:55,555 INFO L82 PathProgramCache]: Analyzing trace with hash 486044464, now seen corresponding path program 51 times [2021-06-05 14:30:55,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:55,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184987890] [2021-06-05 14:30:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:55,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:55,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184987890] [2021-06-05 14:30:55,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184987890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:55,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56783543] [2021-06-05 14:30:55,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:55,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:30:55,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:55,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:55,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56783543] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:55,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:55,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-06-05 14:30:55,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422302875] [2021-06-05 14:30:55,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:55,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:55,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:55,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:55,743 INFO L87 Difference]: Start difference. First operand 299 states and 929 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:55,883 INFO L93 Difference]: Finished difference Result 518 states and 1517 transitions. [2021-06-05 14:30:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:55,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:55,884 INFO L225 Difference]: With dead ends: 518 [2021-06-05 14:30:55,884 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 14:30:55,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 14:30:55,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 300. [2021-06-05 14:30:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.1137123745819397) internal successors, (931), 299 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 931 transitions. [2021-06-05 14:30:55,888 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 931 transitions. Word has length 18 [2021-06-05 14:30:55,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:55,888 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 931 transitions. [2021-06-05 14:30:55,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 931 transitions. [2021-06-05 14:30:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:55,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:55,888 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:56,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:56,089 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:56,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1778386864, now seen corresponding path program 52 times [2021-06-05 14:30:56,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:56,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194199341] [2021-06-05 14:30:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:56,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:56,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194199341] [2021-06-05 14:30:56,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194199341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:56,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919830782] [2021-06-05 14:30:56,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:56,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:30:56,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:56,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919830782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:56,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:56,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:30:56,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87457082] [2021-06-05 14:30:56,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:30:56,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:56,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:30:56,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:56,264 INFO L87 Difference]: Start difference. First operand 300 states and 931 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:56,442 INFO L93 Difference]: Finished difference Result 506 states and 1484 transitions. [2021-06-05 14:30:56,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:56,442 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:56,443 INFO L225 Difference]: With dead ends: 506 [2021-06-05 14:30:56,443 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 14:30:56,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:30:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 14:30:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 289. [2021-06-05 14:30:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1041666666666665) internal successors, (894), 288 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 894 transitions. [2021-06-05 14:30:56,446 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 894 transitions. Word has length 18 [2021-06-05 14:30:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:56,446 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 894 transitions. [2021-06-05 14:30:56,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 894 transitions. [2021-06-05 14:30:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:56,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:56,447 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:56,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 14:30:56,647 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:56,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1819059010, now seen corresponding path program 53 times [2021-06-05 14:30:56,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:56,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681807617] [2021-06-05 14:30:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:56,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:56,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681807617] [2021-06-05 14:30:56,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681807617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:56,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353512492] [2021-06-05 14:30:56,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:56,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:30:56,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:30:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 14:30:56,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:56,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353512492] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:56,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 14:30:56,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-06-05 14:30:56,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863274506] [2021-06-05 14:30:56,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:56,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:56,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:56,787 INFO L87 Difference]: Start difference. First operand 289 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:56,962 INFO L93 Difference]: Finished difference Result 496 states and 1443 transitions. [2021-06-05 14:30:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:56,963 INFO L225 Difference]: With dead ends: 496 [2021-06-05 14:30:56,963 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 14:30:56,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:30:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 14:30:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 286. [2021-06-05 14:30:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.094736842105263) internal successors, (882), 285 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 882 transitions. [2021-06-05 14:30:56,968 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 882 transitions. Word has length 18 [2021-06-05 14:30:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:56,968 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 882 transitions. [2021-06-05 14:30:56,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 882 transitions. [2021-06-05 14:30:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:56,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:56,968 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:57,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 14:30:57,169 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:57,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:57,169 INFO L82 PathProgramCache]: Analyzing trace with hash -760676186, now seen corresponding path program 54 times [2021-06-05 14:30:57,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:57,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89272813] [2021-06-05 14:30:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:57,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:57,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89272813] [2021-06-05 14:30:57,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89272813] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:57,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:57,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:57,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949043280] [2021-06-05 14:30:57,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:57,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:57,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:57,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:57,300 INFO L87 Difference]: Start difference. First operand 286 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:57,406 INFO L93 Difference]: Finished difference Result 544 states and 1547 transitions. [2021-06-05 14:30:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:57,407 INFO L225 Difference]: With dead ends: 544 [2021-06-05 14:30:57,407 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 14:30:57,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 14:30:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 300. [2021-06-05 14:30:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.080267558528428) internal successors, (921), 299 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 921 transitions. [2021-06-05 14:30:57,411 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 921 transitions. Word has length 18 [2021-06-05 14:30:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:57,411 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 921 transitions. [2021-06-05 14:30:57,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 921 transitions. [2021-06-05 14:30:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:57,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:57,411 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:57,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-06-05 14:30:57,412 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:57,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:57,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1618867184, now seen corresponding path program 55 times [2021-06-05 14:30:57,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:57,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723394243] [2021-06-05 14:30:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:57,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:57,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723394243] [2021-06-05 14:30:57,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723394243] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:57,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:57,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:57,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196468430] [2021-06-05 14:30:57,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:57,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:57,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:57,464 INFO L87 Difference]: Start difference. First operand 300 states and 921 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:57,589 INFO L93 Difference]: Finished difference Result 465 states and 1345 transitions. [2021-06-05 14:30:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:30:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:57,590 INFO L225 Difference]: With dead ends: 465 [2021-06-05 14:30:57,590 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 14:30:57,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:30:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 14:30:57,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 298. [2021-06-05 14:30:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0841750841750843) internal successors, (916), 297 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 916 transitions. [2021-06-05 14:30:57,594 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 916 transitions. Word has length 18 [2021-06-05 14:30:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:57,594 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 916 transitions. [2021-06-05 14:30:57,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 916 transitions. [2021-06-05 14:30:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:57,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:57,594 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:57,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-06-05 14:30:57,594 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:57,595 INFO L82 PathProgramCache]: Analyzing trace with hash 290169764, now seen corresponding path program 56 times [2021-06-05 14:30:57,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:57,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649232681] [2021-06-05 14:30:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:57,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649232681] [2021-06-05 14:30:57,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649232681] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:57,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:57,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:57,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610591678] [2021-06-05 14:30:57,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:57,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:57,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:57,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:57,633 INFO L87 Difference]: Start difference. First operand 298 states and 916 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:57,774 INFO L93 Difference]: Finished difference Result 486 states and 1387 transitions. [2021-06-05 14:30:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:30:57,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:57,775 INFO L225 Difference]: With dead ends: 486 [2021-06-05 14:30:57,775 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 14:30:57,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 14:30:57,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 286. [2021-06-05 14:30:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.094736842105263) internal successors, (882), 285 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 882 transitions. [2021-06-05 14:30:57,780 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 882 transitions. Word has length 18 [2021-06-05 14:30:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:57,780 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 882 transitions. [2021-06-05 14:30:57,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 882 transitions. [2021-06-05 14:30:57,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:57,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:57,781 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:57,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-06-05 14:30:57,781 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash -687567564, now seen corresponding path program 64 times [2021-06-05 14:30:57,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:57,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909232721] [2021-06-05 14:30:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:57,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:57,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909232721] [2021-06-05 14:30:57,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909232721] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:57,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:57,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:57,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499373507] [2021-06-05 14:30:57,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:57,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:57,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:57,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:57,826 INFO L87 Difference]: Start difference. First operand 286 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:57,951 INFO L93 Difference]: Finished difference Result 514 states and 1519 transitions. [2021-06-05 14:30:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:57,952 INFO L225 Difference]: With dead ends: 514 [2021-06-05 14:30:57,952 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 14:30:57,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 14:30:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 292. [2021-06-05 14:30:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.1237113402061856) internal successors, (909), 291 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 909 transitions. [2021-06-05 14:30:57,956 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 909 transitions. Word has length 18 [2021-06-05 14:30:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:57,956 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 909 transitions. [2021-06-05 14:30:57,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 909 transitions. [2021-06-05 14:30:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:57,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:57,956 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:57,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-06-05 14:30:57,956 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash 936770204, now seen corresponding path program 65 times [2021-06-05 14:30:57,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:57,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251318867] [2021-06-05 14:30:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:58,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251318867] [2021-06-05 14:30:58,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251318867] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:58,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:58,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:58,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425415266] [2021-06-05 14:30:58,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:58,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:58,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:58,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:58,010 INFO L87 Difference]: Start difference. First operand 292 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:58,152 INFO L93 Difference]: Finished difference Result 517 states and 1525 transitions. [2021-06-05 14:30:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:58,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:58,153 INFO L225 Difference]: With dead ends: 517 [2021-06-05 14:30:58,153 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 14:30:58,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 14:30:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 289. [2021-06-05 14:30:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1041666666666665) internal successors, (894), 288 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 894 transitions. [2021-06-05 14:30:58,156 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 894 transitions. Word has length 18 [2021-06-05 14:30:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:58,157 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 894 transitions. [2021-06-05 14:30:58,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 894 transitions. [2021-06-05 14:30:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:58,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:58,157 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:58,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-06-05 14:30:58,157 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:58,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1977006002, now seen corresponding path program 66 times [2021-06-05 14:30:58,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:58,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611004930] [2021-06-05 14:30:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:58,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611004930] [2021-06-05 14:30:58,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611004930] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:58,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:58,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:58,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619424394] [2021-06-05 14:30:58,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:58,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:58,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:58,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:58,214 INFO L87 Difference]: Start difference. First operand 289 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:58,353 INFO L93 Difference]: Finished difference Result 508 states and 1493 transitions. [2021-06-05 14:30:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:58,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:58,354 INFO L225 Difference]: With dead ends: 508 [2021-06-05 14:30:58,354 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:30:58,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:30:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:30:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 285. [2021-06-05 14:30:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0880281690140845) internal successors, (877), 284 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-06-05 14:30:58,358 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-06-05 14:30:58,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:58,358 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-06-05 14:30:58,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,358 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-06-05 14:30:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:58,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:58,359 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:58,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-06-05 14:30:58,359 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:58,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:58,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1821454276, now seen corresponding path program 57 times [2021-06-05 14:30:58,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:58,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491198031] [2021-06-05 14:30:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:58,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491198031] [2021-06-05 14:30:58,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491198031] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:58,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:58,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:58,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147445899] [2021-06-05 14:30:58,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:58,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:58,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:58,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:58,389 INFO L87 Difference]: Start difference. First operand 285 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:58,455 INFO L93 Difference]: Finished difference Result 435 states and 1231 transitions. [2021-06-05 14:30:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:58,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:58,456 INFO L225 Difference]: With dead ends: 435 [2021-06-05 14:30:58,456 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 14:30:58,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 14:30:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 297. [2021-06-05 14:30:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.0777027027027026) internal successors, (911), 296 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 911 transitions. [2021-06-05 14:30:58,459 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 911 transitions. Word has length 18 [2021-06-05 14:30:58,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:58,459 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 911 transitions. [2021-06-05 14:30:58,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 911 transitions. [2021-06-05 14:30:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:58,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:58,460 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:58,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-06-05 14:30:58,460 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:58,460 INFO L82 PathProgramCache]: Analyzing trace with hash 558089094, now seen corresponding path program 58 times [2021-06-05 14:30:58,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:58,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606899893] [2021-06-05 14:30:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:58,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606899893] [2021-06-05 14:30:58,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606899893] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:58,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:58,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:58,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340122630] [2021-06-05 14:30:58,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:58,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:58,506 INFO L87 Difference]: Start difference. First operand 297 states and 911 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:58,589 INFO L93 Difference]: Finished difference Result 379 states and 1118 transitions. [2021-06-05 14:30:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:58,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:58,590 INFO L225 Difference]: With dead ends: 379 [2021-06-05 14:30:58,590 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 14:30:58,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 14:30:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 295. [2021-06-05 14:30:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0816326530612246) internal successors, (906), 294 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 906 transitions. [2021-06-05 14:30:58,594 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 906 transitions. Word has length 18 [2021-06-05 14:30:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:58,594 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 906 transitions. [2021-06-05 14:30:58,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,595 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 906 transitions. [2021-06-05 14:30:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:58,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:58,595 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:58,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-06-05 14:30:58,595 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:58,596 INFO L82 PathProgramCache]: Analyzing trace with hash -770608326, now seen corresponding path program 59 times [2021-06-05 14:30:58,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:58,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980848926] [2021-06-05 14:30:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:58,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980848926] [2021-06-05 14:30:58,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980848926] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:58,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:58,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:58,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544323068] [2021-06-05 14:30:58,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:58,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:58,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:58,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:58,639 INFO L87 Difference]: Start difference. First operand 295 states and 906 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:58,734 INFO L93 Difference]: Finished difference Result 404 states and 1172 transitions. [2021-06-05 14:30:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:58,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:58,735 INFO L225 Difference]: With dead ends: 404 [2021-06-05 14:30:58,735 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 14:30:58,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 14:30:58,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 283. [2021-06-05 14:30:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.0921985815602837) internal successors, (872), 282 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 872 transitions. [2021-06-05 14:30:58,738 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 872 transitions. Word has length 18 [2021-06-05 14:30:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:58,738 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 872 transitions. [2021-06-05 14:30:58,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 872 transitions. [2021-06-05 14:30:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:58,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:58,739 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:58,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-06-05 14:30:58,739 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:58,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1443851738, now seen corresponding path program 67 times [2021-06-05 14:30:58,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:58,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526655574] [2021-06-05 14:30:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:58,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526655574] [2021-06-05 14:30:58,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526655574] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:58,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:58,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:58,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704943882] [2021-06-05 14:30:58,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:58,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:58,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:58,767 INFO L87 Difference]: Start difference. First operand 283 states and 872 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:58,862 INFO L93 Difference]: Finished difference Result 443 states and 1306 transitions. [2021-06-05 14:30:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:58,863 INFO L225 Difference]: With dead ends: 443 [2021-06-05 14:30:58,863 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 14:30:58,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:58,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 14:30:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 282. [2021-06-05 14:30:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.088967971530249) internal successors, (868), 281 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 868 transitions. [2021-06-05 14:30:58,867 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 868 transitions. Word has length 18 [2021-06-05 14:30:58,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:58,867 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 868 transitions. [2021-06-05 14:30:58,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 868 transitions. [2021-06-05 14:30:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:58,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:58,867 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:58,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-06-05 14:30:58,867 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:58,867 INFO L82 PathProgramCache]: Analyzing trace with hash -270558368, now seen corresponding path program 68 times [2021-06-05 14:30:58,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:58,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934716270] [2021-06-05 14:30:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:58,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:58,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934716270] [2021-06-05 14:30:58,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934716270] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:58,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:58,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:58,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051976176] [2021-06-05 14:30:58,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:58,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:58,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:58,909 INFO L87 Difference]: Start difference. First operand 282 states and 868 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:59,015 INFO L93 Difference]: Finished difference Result 485 states and 1413 transitions. [2021-06-05 14:30:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:59,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:59,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:59,015 INFO L225 Difference]: With dead ends: 485 [2021-06-05 14:30:59,016 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 14:30:59,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 14:30:59,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 285. [2021-06-05 14:30:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.109154929577465) internal successors, (883), 284 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 883 transitions. [2021-06-05 14:30:59,020 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 883 transitions. Word has length 18 [2021-06-05 14:30:59,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:59,020 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 883 transitions. [2021-06-05 14:30:59,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 883 transitions. [2021-06-05 14:30:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:59,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:59,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:59,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-06-05 14:30:59,021 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:59,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:59,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1353779400, now seen corresponding path program 69 times [2021-06-05 14:30:59,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:59,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732204616] [2021-06-05 14:30:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:59,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:59,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732204616] [2021-06-05 14:30:59,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732204616] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:59,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:59,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:59,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352261607] [2021-06-05 14:30:59,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:59,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:59,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:59,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:59,060 INFO L87 Difference]: Start difference. First operand 285 states and 883 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:59,147 INFO L93 Difference]: Finished difference Result 443 states and 1318 transitions. [2021-06-05 14:30:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:59,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:59,148 INFO L225 Difference]: With dead ends: 443 [2021-06-05 14:30:59,148 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 14:30:59,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:59,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 14:30:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 279. [2021-06-05 14:30:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.079136690647482) internal successors, (856), 278 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 856 transitions. [2021-06-05 14:30:59,152 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 856 transitions. Word has length 18 [2021-06-05 14:30:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:59,152 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 856 transitions. [2021-06-05 14:30:59,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 856 transitions. [2021-06-05 14:30:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:59,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:59,152 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:59,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-06-05 14:30:59,152 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1960501272, now seen corresponding path program 70 times [2021-06-05 14:30:59,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:59,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675373156] [2021-06-05 14:30:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:59,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:59,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675373156] [2021-06-05 14:30:59,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675373156] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:59,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:59,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:59,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324433347] [2021-06-05 14:30:59,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:59,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:59,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:59,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:59,185 INFO L87 Difference]: Start difference. First operand 279 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:59,271 INFO L93 Difference]: Finished difference Result 463 states and 1339 transitions. [2021-06-05 14:30:59,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:59,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:59,272 INFO L225 Difference]: With dead ends: 463 [2021-06-05 14:30:59,272 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 14:30:59,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 14:30:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 280. [2021-06-05 14:30:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.075268817204301) internal successors, (858), 279 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 858 transitions. [2021-06-05 14:30:59,276 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 858 transitions. Word has length 18 [2021-06-05 14:30:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:59,276 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 858 transitions. [2021-06-05 14:30:59,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 858 transitions. [2021-06-05 14:30:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:59,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:59,276 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:59,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-06-05 14:30:59,276 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:59,276 INFO L82 PathProgramCache]: Analyzing trace with hash -336163504, now seen corresponding path program 71 times [2021-06-05 14:30:59,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:59,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425167525] [2021-06-05 14:30:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:59,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:59,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425167525] [2021-06-05 14:30:59,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425167525] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:59,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:59,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:59,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689399849] [2021-06-05 14:30:59,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:59,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:59,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:59,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:59,310 INFO L87 Difference]: Start difference. First operand 280 states and 858 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:59,420 INFO L93 Difference]: Finished difference Result 466 states and 1345 transitions. [2021-06-05 14:30:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:59,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:59,421 INFO L225 Difference]: With dead ends: 466 [2021-06-05 14:30:59,421 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 14:30:59,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:59,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 14:30:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 277. [2021-06-05 14:30:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0543478260869565) internal successors, (843), 276 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 843 transitions. [2021-06-05 14:30:59,425 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 843 transitions. Word has length 18 [2021-06-05 14:30:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:59,425 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 843 transitions. [2021-06-05 14:30:59,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 843 transitions. [2021-06-05 14:30:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:30:59,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:59,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:59,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-06-05 14:30:59,426 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:59,426 INFO L82 PathProgramCache]: Analyzing trace with hash 704072294, now seen corresponding path program 72 times [2021-06-05 14:30:59,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:59,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099958827] [2021-06-05 14:30:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:30:59,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:59,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099958827] [2021-06-05 14:30:59,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099958827] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:30:59,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:30:59,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 14:30:59,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659886201] [2021-06-05 14:30:59,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:30:59,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:59,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:30:59,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:30:59,467 INFO L87 Difference]: Start difference. First operand 277 states and 843 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:59,572 INFO L93 Difference]: Finished difference Result 415 states and 1214 transitions. [2021-06-05 14:30:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:30:59,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:30:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:59,573 INFO L225 Difference]: With dead ends: 415 [2021-06-05 14:30:59,573 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 14:30:59,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:30:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 14:30:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 263. [2021-06-05 14:30:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.053435114503817) internal successors, (800), 262 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 800 transitions. [2021-06-05 14:30:59,577 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 800 transitions. Word has length 18 [2021-06-05 14:30:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:59,578 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 800 transitions. [2021-06-05 14:30:59,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 800 transitions. [2021-06-05 14:30:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:59,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:59,578 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:30:59,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-06-05 14:30:59,578 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:30:59,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:30:59,579 INFO L82 PathProgramCache]: Analyzing trace with hash 991123733, now seen corresponding path program 1 times [2021-06-05 14:30:59,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:30:59,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934835764] [2021-06-05 14:30:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:30:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:30:59,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:30:59,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934835764] [2021-06-05 14:30:59,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934835764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:59,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743388333] [2021-06-05 14:30:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:30:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:30:59,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:30:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:30:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:30:59,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743388333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:30:59,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:30:59,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 14:30:59,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755301587] [2021-06-05 14:30:59,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:30:59,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:30:59,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:30:59,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:30:59,774 INFO L87 Difference]: Start difference. First operand 263 states and 800 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:30:59,837 INFO L93 Difference]: Finished difference Result 474 states and 1387 transitions. [2021-06-05 14:30:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:30:59,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:30:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:30:59,838 INFO L225 Difference]: With dead ends: 474 [2021-06-05 14:30:59,839 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 14:30:59,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:30:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 14:30:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 307. [2021-06-05 14:30:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0718954248366015) internal successors, (940), 306 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 940 transitions. [2021-06-05 14:30:59,843 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 940 transitions. Word has length 19 [2021-06-05 14:30:59,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:30:59,843 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 940 transitions. [2021-06-05 14:30:59,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:30:59,843 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 940 transitions. [2021-06-05 14:30:59,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:30:59,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:30:59,844 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:00,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 14:31:00,045 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1443659084, now seen corresponding path program 1 times [2021-06-05 14:31:00,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:00,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829562231] [2021-06-05 14:31:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:00,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:00,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829562231] [2021-06-05 14:31:00,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829562231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:00,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270009750] [2021-06-05 14:31:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:00,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:00,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:00,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:00,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:00,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:00,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:00,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 14:31:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:00,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270009750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:00,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:00,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:00,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348599398] [2021-06-05 14:31:00,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:00,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:00,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:00,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:00,556 INFO L87 Difference]: Start difference. First operand 307 states and 940 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:01,113 INFO L93 Difference]: Finished difference Result 475 states and 1332 transitions. [2021-06-05 14:31:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:01,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:01,114 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:31:01,114 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 14:31:01,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 660.4ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:31:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 14:31:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 317. [2021-06-05 14:31:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.0569620253164556) internal successors, (966), 316 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 966 transitions. [2021-06-05 14:31:01,118 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 966 transitions. Word has length 19 [2021-06-05 14:31:01,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:01,118 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 966 transitions. [2021-06-05 14:31:01,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 966 transitions. [2021-06-05 14:31:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:01,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:01,119 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:01,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:01,325 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash -979539610, now seen corresponding path program 2 times [2021-06-05 14:31:01,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:01,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003992622] [2021-06-05 14:31:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:01,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:01,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003992622] [2021-06-05 14:31:01,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003992622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:01,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913960] [2021-06-05 14:31:01,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:01,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:01,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:01,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:01,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:01,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:01,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:01,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:01,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:01,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:01,869 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:31:01,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:01,870 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:31:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:01,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:01,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:01,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:01,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091998237] [2021-06-05 14:31:01,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:01,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:01,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:01,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:01,955 INFO L87 Difference]: Start difference. First operand 317 states and 966 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:02,788 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-05 14:31:02,913 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 14:31:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:03,062 INFO L93 Difference]: Finished difference Result 483 states and 1370 transitions. [2021-06-05 14:31:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:31:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:03,063 INFO L225 Difference]: With dead ends: 483 [2021-06-05 14:31:03,063 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 14:31:03,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1254.6ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:31:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 14:31:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 320. [2021-06-05 14:31:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.053291536050157) internal successors, (974), 319 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 974 transitions. [2021-06-05 14:31:03,068 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 974 transitions. Word has length 19 [2021-06-05 14:31:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:03,068 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 974 transitions. [2021-06-05 14:31:03,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 974 transitions. [2021-06-05 14:31:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:03,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:03,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:03,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:03,285 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:03,285 INFO L82 PathProgramCache]: Analyzing trace with hash 114551978, now seen corresponding path program 3 times [2021-06-05 14:31:03,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:03,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192089527] [2021-06-05 14:31:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:03,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:03,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192089527] [2021-06-05 14:31:03,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192089527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:03,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054232376] [2021-06-05 14:31:03,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:03,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:03,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:03,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:03,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:03,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:03,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:03,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:03,726 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:03,730 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:03,768 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-05 14:31:03,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:03,770 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-05 14:31:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:03,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054232376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:03,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:03,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:03,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111386201] [2021-06-05 14:31:03,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:03,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:03,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:03,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:03,842 INFO L87 Difference]: Start difference. First operand 320 states and 974 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:04,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:04,467 INFO L93 Difference]: Finished difference Result 442 states and 1271 transitions. [2021-06-05 14:31:04,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:04,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:04,468 INFO L225 Difference]: With dead ends: 442 [2021-06-05 14:31:04,468 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 14:31:04,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 14:31:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 326. [2021-06-05 14:31:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.046153846153846) internal successors, (990), 325 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 990 transitions. [2021-06-05 14:31:04,472 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 990 transitions. Word has length 19 [2021-06-05 14:31:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:04,472 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 990 transitions. [2021-06-05 14:31:04,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 990 transitions. [2021-06-05 14:31:04,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:04,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:04,472 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:04,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:04,676 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:04,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1325886340, now seen corresponding path program 4 times [2021-06-05 14:31:04,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:04,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089048798] [2021-06-05 14:31:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:04,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:04,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089048798] [2021-06-05 14:31:04,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089048798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:04,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080352656] [2021-06-05 14:31:04,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:04,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:04,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:04,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:04,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:05,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:05,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:05,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:05,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:05,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:05,060 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:05,065 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:05,069 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:05,073 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:05,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:05,081 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:05,084 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:05,089 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:05,159 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-05 14:31:05,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:05,160 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 14:31:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:05,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080352656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:05,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:05,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:05,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261095465] [2021-06-05 14:31:05,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:05,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:05,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:05,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:05,285 INFO L87 Difference]: Start difference. First operand 326 states and 990 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:06,004 INFO L93 Difference]: Finished difference Result 466 states and 1319 transitions. [2021-06-05 14:31:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:06,005 INFO L225 Difference]: With dead ends: 466 [2021-06-05 14:31:06,005 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 14:31:06,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 849.9ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 14:31:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 329. [2021-06-05 14:31:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.042682926829268) internal successors, (998), 328 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 998 transitions. [2021-06-05 14:31:06,009 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 998 transitions. Word has length 19 [2021-06-05 14:31:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:06,009 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 998 transitions. [2021-06-05 14:31:06,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 998 transitions. [2021-06-05 14:31:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:06,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:06,010 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:06,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 14:31:06,210 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:06,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:06,210 INFO L82 PathProgramCache]: Analyzing trace with hash 822910196, now seen corresponding path program 5 times [2021-06-05 14:31:06,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:06,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9760280] [2021-06-05 14:31:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:06,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:06,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9760280] [2021-06-05 14:31:06,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9760280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:06,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351635550] [2021-06-05 14:31:06,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:06,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:31:06,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:06,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:06,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:06,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:06,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:06,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:06,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:06,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:06,525 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:06,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:06,534 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:06,539 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:06,542 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:06,546 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:06,550 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:06,554 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:06,615 INFO L628 ElimStorePlain]: treesize reduction 58, result has 50.4 percent of original size [2021-06-05 14:31:06,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:06,620 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:430, output treesize:59 [2021-06-05 14:31:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:06,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351635550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:06,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:06,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:31:06,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531458956] [2021-06-05 14:31:06,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:31:06,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:06,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:31:06,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:31:06,749 INFO L87 Difference]: Start difference. First operand 329 states and 998 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:07,450 INFO L93 Difference]: Finished difference Result 507 states and 1422 transitions. [2021-06-05 14:31:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:07,451 INFO L225 Difference]: With dead ends: 507 [2021-06-05 14:31:07,451 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 14:31:07,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 773.9ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 14:31:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 344. [2021-06-05 14:31:07,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.043731778425656) internal successors, (1044), 343 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1044 transitions. [2021-06-05 14:31:07,455 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1044 transitions. Word has length 19 [2021-06-05 14:31:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:07,455 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1044 transitions. [2021-06-05 14:31:07,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1044 transitions. [2021-06-05 14:31:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:07,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:07,457 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:07,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 14:31:07,671 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash -771246302, now seen corresponding path program 6 times [2021-06-05 14:31:07,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:07,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556188801] [2021-06-05 14:31:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:07,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556188801] [2021-06-05 14:31:07,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556188801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:07,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104539169] [2021-06-05 14:31:07,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:07,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:07,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:07,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:07,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:08,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:08,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:08,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:08,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:08,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:08,069 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:31:08,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:08,070 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:31:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:08,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104539169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:08,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:08,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:08,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494116147] [2021-06-05 14:31:08,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:08,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:08,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:08,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:08,138 INFO L87 Difference]: Start difference. First operand 344 states and 1044 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:08,595 INFO L93 Difference]: Finished difference Result 480 states and 1384 transitions. [2021-06-05 14:31:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:08,596 INFO L225 Difference]: With dead ends: 480 [2021-06-05 14:31:08,596 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 14:31:08,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:08,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 14:31:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 360. [2021-06-05 14:31:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0250696378830084) internal successors, (1086), 359 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1086 transitions. [2021-06-05 14:31:08,600 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1086 transitions. Word has length 19 [2021-06-05 14:31:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:08,600 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1086 transitions. [2021-06-05 14:31:08,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1086 transitions. [2021-06-05 14:31:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:08,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:08,600 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:08,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:08,801 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:08,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:08,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2083282676, now seen corresponding path program 7 times [2021-06-05 14:31:08,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:08,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214536699] [2021-06-05 14:31:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:08,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:08,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214536699] [2021-06-05 14:31:08,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214536699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:08,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083623953] [2021-06-05 14:31:08,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:08,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:08,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:09,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:09,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:09,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:09,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:09,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:09,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:09,168 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:09,173 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:09,248 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-05 14:31:09,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:09,249 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:266, output treesize:67 [2021-06-05 14:31:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:09,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083623953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:09,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:09,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:09,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898569513] [2021-06-05 14:31:09,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:09,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:09,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:09,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:09,382 INFO L87 Difference]: Start difference. First operand 360 states and 1086 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:10,061 INFO L93 Difference]: Finished difference Result 535 states and 1491 transitions. [2021-06-05 14:31:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:10,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:10,062 INFO L225 Difference]: With dead ends: 535 [2021-06-05 14:31:10,062 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 14:31:10,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 773.0ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:31:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 14:31:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 369. [2021-06-05 14:31:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0407608695652173) internal successors, (1119), 368 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1119 transitions. [2021-06-05 14:31:10,066 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1119 transitions. Word has length 19 [2021-06-05 14:31:10,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:10,066 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1119 transitions. [2021-06-05 14:31:10,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:10,066 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1119 transitions. [2021-06-05 14:31:10,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:10,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:10,067 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:10,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 14:31:10,267 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:10,268 INFO L82 PathProgramCache]: Analyzing trace with hash -62888084, now seen corresponding path program 8 times [2021-06-05 14:31:10,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:10,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791525805] [2021-06-05 14:31:10,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:10,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:10,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791525805] [2021-06-05 14:31:10,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791525805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:10,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777176507] [2021-06-05 14:31:10,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:10,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:10,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:10,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:10,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:10,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:10,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:10,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:10,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:10,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:10,588 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:10,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:10,594 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:10,597 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:10,601 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:10,605 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:10,609 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:10,661 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:31:10,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:10,662 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:31:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:10,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777176507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:10,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:10,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:10,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802794557] [2021-06-05 14:31:10,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:10,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:10,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:10,787 INFO L87 Difference]: Start difference. First operand 369 states and 1119 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:11,398 INFO L93 Difference]: Finished difference Result 548 states and 1558 transitions. [2021-06-05 14:31:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:11,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:11,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:11,399 INFO L225 Difference]: With dead ends: 548 [2021-06-05 14:31:11,399 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 14:31:11,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:11,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 14:31:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 378. [2021-06-05 14:31:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.0716180371352784) internal successors, (1158), 377 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1158 transitions. [2021-06-05 14:31:11,404 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1158 transitions. Word has length 19 [2021-06-05 14:31:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:11,404 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1158 transitions. [2021-06-05 14:31:11,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1158 transitions. [2021-06-05 14:31:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:11,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:11,404 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:11,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:11,605 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:11,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1075580616, now seen corresponding path program 9 times [2021-06-05 14:31:11,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:11,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243727679] [2021-06-05 14:31:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:11,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:11,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243727679] [2021-06-05 14:31:11,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243727679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:11,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99900994] [2021-06-05 14:31:11,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:11,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:11,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:11,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:12,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:12,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:12,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:12,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:12,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:12,105 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:12,108 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:12,112 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:12,115 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:12,119 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:12,122 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:12,174 INFO L628 ElimStorePlain]: treesize reduction 32, result has 65.6 percent of original size [2021-06-05 14:31:12,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:12,175 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:358, output treesize:61 [2021-06-05 14:31:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:12,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99900994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:12,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:12,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:12,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519462308] [2021-06-05 14:31:12,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:12,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:12,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:12,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:12,272 INFO L87 Difference]: Start difference. First operand 378 states and 1158 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:12,630 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-06-05 14:31:12,748 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-06-05 14:31:12,883 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-06-05 14:31:13,016 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-06-05 14:31:13,144 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-06-05 14:31:13,286 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 14:31:13,414 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-06-05 14:31:13,553 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-06-05 14:31:13,708 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 14:31:13,948 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 14:31:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:13,967 INFO L93 Difference]: Finished difference Result 630 states and 1766 transitions. [2021-06-05 14:31:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:31:13,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:13,968 INFO L225 Difference]: With dead ends: 630 [2021-06-05 14:31:13,968 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 14:31:13,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1890.5ms TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:31:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 14:31:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 387. [2021-06-05 14:31:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.062176165803109) internal successors, (1182), 386 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1182 transitions. [2021-06-05 14:31:13,972 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1182 transitions. Word has length 19 [2021-06-05 14:31:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:13,973 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1182 transitions. [2021-06-05 14:31:13,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1182 transitions. [2021-06-05 14:31:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:13,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:13,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:14,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 14:31:14,174 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:14,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:14,174 INFO L82 PathProgramCache]: Analyzing trace with hash -304728262, now seen corresponding path program 10 times [2021-06-05 14:31:14,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:14,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537511869] [2021-06-05 14:31:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:14,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:14,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537511869] [2021-06-05 14:31:14,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537511869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:14,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018177866] [2021-06-05 14:31:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:14,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:14,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:14,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:14,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:14,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:14,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:14,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:14,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:14,571 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 14:31:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:14,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018177866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:14,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:14,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:14,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179260772] [2021-06-05 14:31:14,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:14,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:14,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:14,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:14,642 INFO L87 Difference]: Start difference. First operand 387 states and 1182 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:15,351 INFO L93 Difference]: Finished difference Result 656 states and 1844 transitions. [2021-06-05 14:31:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:15,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:15,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:15,352 INFO L225 Difference]: With dead ends: 656 [2021-06-05 14:31:15,352 INFO L226 Difference]: Without dead ends: 616 [2021-06-05 14:31:15,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 799.0ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-05 14:31:15,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 399. [2021-06-05 14:31:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0603015075376883) internal successors, (1218), 398 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1218 transitions. [2021-06-05 14:31:15,361 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1218 transitions. Word has length 19 [2021-06-05 14:31:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:15,361 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1218 transitions. [2021-06-05 14:31:15,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1218 transitions. [2021-06-05 14:31:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:15,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:15,362 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:15,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 14:31:15,562 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:15,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:15,562 INFO L82 PathProgramCache]: Analyzing trace with hash 159391212, now seen corresponding path program 11 times [2021-06-05 14:31:15,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:15,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968451613] [2021-06-05 14:31:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:15,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:15,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968451613] [2021-06-05 14:31:15,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968451613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:15,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577795263] [2021-06-05 14:31:15,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:15,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:15,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:15,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:15,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:15,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:15,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:15,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:15,999 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:16,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:16,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:16,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:16,006 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:16,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:16,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:16,048 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-05 14:31:16,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:16,049 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:43 [2021-06-05 14:31:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:16,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577795263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:16,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:16,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:16,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955459827] [2021-06-05 14:31:16,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:16,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:16,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:16,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:16,115 INFO L87 Difference]: Start difference. First operand 399 states and 1218 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:16,847 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-06-05 14:31:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:17,072 INFO L93 Difference]: Finished difference Result 657 states and 1867 transitions. [2021-06-05 14:31:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:17,072 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:17,073 INFO L225 Difference]: With dead ends: 657 [2021-06-05 14:31:17,073 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 14:31:17,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1050.2ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:31:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 14:31:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 402. [2021-06-05 14:31:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.064837905236908) internal successors, (1229), 401 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1229 transitions. [2021-06-05 14:31:17,078 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1229 transitions. Word has length 19 [2021-06-05 14:31:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:17,078 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1229 transitions. [2021-06-05 14:31:17,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1229 transitions. [2021-06-05 14:31:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:17,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:17,078 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:17,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 14:31:17,279 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1253482800, now seen corresponding path program 12 times [2021-06-05 14:31:17,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:17,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405811108] [2021-06-05 14:31:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:17,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:17,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405811108] [2021-06-05 14:31:17,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405811108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:17,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938142711] [2021-06-05 14:31:17,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:17,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:17,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:17,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:17,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:17,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:17,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:17,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:17,685 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:31:17,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:17,686 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:31:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:17,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938142711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:17,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:17,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:17,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793065327] [2021-06-05 14:31:17,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:17,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:17,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:17,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:17,745 INFO L87 Difference]: Start difference. First operand 402 states and 1229 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:18,374 INFO L93 Difference]: Finished difference Result 662 states and 1878 transitions. [2021-06-05 14:31:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:31:18,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:18,375 INFO L225 Difference]: With dead ends: 662 [2021-06-05 14:31:18,375 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 14:31:18,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 681.9ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:31:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 14:31:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 408. [2021-06-05 14:31:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0663390663390664) internal successors, (1248), 407 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-06-05 14:31:18,380 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-06-05 14:31:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:18,380 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-06-05 14:31:18,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-06-05 14:31:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:18,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:18,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:18,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 14:31:18,581 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:18,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:18,581 INFO L82 PathProgramCache]: Analyzing trace with hash -186955518, now seen corresponding path program 13 times [2021-06-05 14:31:18,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:18,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952540352] [2021-06-05 14:31:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:18,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:18,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952540352] [2021-06-05 14:31:18,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952540352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:18,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512581037] [2021-06-05 14:31:18,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:18,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:18,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:18,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:18,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:18,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:18,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:18,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:18,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:18,999 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:19,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:19,009 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:19,013 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:19,018 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:19,106 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-06-05 14:31:19,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:19,107 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 14:31:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:19,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512581037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:19,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:19,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:19,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980255540] [2021-06-05 14:31:19,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:19,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:19,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:19,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:19,239 INFO L87 Difference]: Start difference. First operand 408 states and 1248 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:20,421 INFO L93 Difference]: Finished difference Result 724 states and 2000 transitions. [2021-06-05 14:31:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:31:20,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:20,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:20,422 INFO L225 Difference]: With dead ends: 724 [2021-06-05 14:31:20,422 INFO L226 Difference]: Without dead ends: 674 [2021-06-05 14:31:20,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1277.8ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:31:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-05 14:31:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 408. [2021-06-05 14:31:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0663390663390664) internal successors, (1248), 407 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-06-05 14:31:20,427 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-06-05 14:31:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:20,427 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-06-05 14:31:20,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-06-05 14:31:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:20,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:20,428 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:20,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:20,628 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1961841018, now seen corresponding path program 14 times [2021-06-05 14:31:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:20,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84114259] [2021-06-05 14:31:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:20,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:20,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84114259] [2021-06-05 14:31:20,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84114259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:20,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410436933] [2021-06-05 14:31:20,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:20,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:20,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:20,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:20,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:20,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:20,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:20,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:20,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:20,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:20,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:20,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:20,957 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:21,017 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-05 14:31:21,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:21,018 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:202, output treesize:61 [2021-06-05 14:31:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:21,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410436933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:21,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:21,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:31:21,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531532172] [2021-06-05 14:31:21,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:31:21,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:21,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:31:21,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:31:21,133 INFO L87 Difference]: Start difference. First operand 408 states and 1248 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:21,863 INFO L93 Difference]: Finished difference Result 616 states and 1773 transitions. [2021-06-05 14:31:21,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:21,863 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:21,864 INFO L225 Difference]: With dead ends: 616 [2021-06-05 14:31:21,864 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 14:31:21,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 773.0ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 14:31:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 408. [2021-06-05 14:31:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0663390663390664) internal successors, (1248), 407 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-06-05 14:31:21,869 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-06-05 14:31:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:21,869 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-06-05 14:31:21,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-06-05 14:31:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:21,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:21,869 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:22,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-06-05 14:31:22,070 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:22,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:22,070 INFO L82 PathProgramCache]: Analyzing trace with hash 236586928, now seen corresponding path program 15 times [2021-06-05 14:31:22,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:22,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084698057] [2021-06-05 14:31:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:22,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:22,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084698057] [2021-06-05 14:31:22,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084698057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:22,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457776435] [2021-06-05 14:31:22,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:22,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:22,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:22,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:22,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:22,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:22,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:22,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:22,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:22,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:22,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:22,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:22,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:22,509 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:22,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:22,512 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:22,553 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 14:31:22,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:22,554 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 14:31:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:22,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457776435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:22,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:22,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:22,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994475308] [2021-06-05 14:31:22,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:22,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:22,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:22,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:22,628 INFO L87 Difference]: Start difference. First operand 408 states and 1248 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,283 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-06-05 14:31:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:23,836 INFO L93 Difference]: Finished difference Result 772 states and 2161 transitions. [2021-06-05 14:31:23,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:31:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:23,837 INFO L225 Difference]: With dead ends: 772 [2021-06-05 14:31:23,837 INFO L226 Difference]: Without dead ends: 710 [2021-06-05 14:31:23,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1320.3ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:31:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-05 14:31:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 425. [2021-06-05 14:31:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.0542452830188678) internal successors, (1295), 424 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1295 transitions. [2021-06-05 14:31:23,845 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1295 transitions. Word has length 19 [2021-06-05 14:31:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:23,845 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1295 transitions. [2021-06-05 14:31:23,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1295 transitions. [2021-06-05 14:31:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:23,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:23,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:24,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 14:31:24,069 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:24,069 INFO L82 PathProgramCache]: Analyzing trace with hash -678427472, now seen corresponding path program 16 times [2021-06-05 14:31:24,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:24,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706223327] [2021-06-05 14:31:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:24,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706223327] [2021-06-05 14:31:24,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706223327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933080094] [2021-06-05 14:31:24,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:24,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:24,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:24,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:24,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:24,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:24,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:24,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:24,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:24,567 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 14:31:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:24,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933080094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:24,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:24,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:24,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429297520] [2021-06-05 14:31:24,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:24,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:24,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:24,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:24,634 INFO L87 Difference]: Start difference. First operand 425 states and 1295 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:24,912 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 14:31:25,120 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 14:31:25,337 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 14:31:25,499 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-06-05 14:31:25,719 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 14:31:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:25,732 INFO L93 Difference]: Finished difference Result 640 states and 1840 transitions. [2021-06-05 14:31:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:25,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:25,733 INFO L225 Difference]: With dead ends: 640 [2021-06-05 14:31:25,733 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 14:31:25,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1257.0ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 14:31:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 427. [2021-06-05 14:31:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.056338028169014) internal successors, (1302), 426 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1302 transitions. [2021-06-05 14:31:25,738 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1302 transitions. Word has length 19 [2021-06-05 14:31:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:25,738 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1302 transitions. [2021-06-05 14:31:25,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1302 transitions. [2021-06-05 14:31:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:25,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:25,739 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:25,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 14:31:25,939 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:25,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1445273620, now seen corresponding path program 17 times [2021-06-05 14:31:25,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:25,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338434908] [2021-06-05 14:31:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:26,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:26,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338434908] [2021-06-05 14:31:26,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338434908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:26,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398765289] [2021-06-05 14:31:26,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:26,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:26,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:26,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:26,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:26,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:26,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:26,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:26,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:26,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:26,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:26,417 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-05 14:31:26,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:26,419 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-05 14:31:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:26,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398765289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:26,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:26,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:26,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020394295] [2021-06-05 14:31:26,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:26,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:26,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:26,541 INFO L87 Difference]: Start difference. First operand 427 states and 1302 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:26,833 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 14:31:27,044 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 14:31:27,254 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 14:31:27,511 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 14:31:27,740 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-05 14:31:27,955 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 14:31:28,170 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 14:31:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:28,196 INFO L93 Difference]: Finished difference Result 698 states and 1967 transitions. [2021-06-05 14:31:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:28,197 INFO L225 Difference]: With dead ends: 698 [2021-06-05 14:31:28,197 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 14:31:28,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1761.5ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:31:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 14:31:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 425. [2021-06-05 14:31:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.0542452830188678) internal successors, (1295), 424 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1295 transitions. [2021-06-05 14:31:28,202 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1295 transitions. Word has length 19 [2021-06-05 14:31:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:28,202 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1295 transitions. [2021-06-05 14:31:28,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1295 transitions. [2021-06-05 14:31:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:28,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:28,202 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:28,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 14:31:28,403 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:28,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1969462800, now seen corresponding path program 18 times [2021-06-05 14:31:28,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:28,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419247982] [2021-06-05 14:31:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:28,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:28,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419247982] [2021-06-05 14:31:28,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419247982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:28,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14450931] [2021-06-05 14:31:28,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:28,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:28,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:28,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:28,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:28,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:28,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:28,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:28,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:28,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:28,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:28,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:28,929 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:28,934 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:28,937 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:28,984 INFO L628 ElimStorePlain]: treesize reduction 59, result has 42.2 percent of original size [2021-06-05 14:31:28,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:28,985 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:234, output treesize:43 [2021-06-05 14:31:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:29,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14450931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:29,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:29,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:29,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763342551] [2021-06-05 14:31:29,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:29,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:29,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:29,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:29,057 INFO L87 Difference]: Start difference. First operand 425 states and 1295 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:29,354 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-06-05 14:31:29,834 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 14:31:29,953 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 14:31:30,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:30,001 INFO L93 Difference]: Finished difference Result 673 states and 1948 transitions. [2021-06-05 14:31:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:30,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:30,002 INFO L225 Difference]: With dead ends: 673 [2021-06-05 14:31:30,002 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 14:31:30,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1047.9ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 14:31:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 428. [2021-06-05 14:31:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0679156908665104) internal successors, (1310), 427 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1310 transitions. [2021-06-05 14:31:30,008 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1310 transitions. Word has length 19 [2021-06-05 14:31:30,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:30,008 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1310 transitions. [2021-06-05 14:31:30,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:30,008 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1310 transitions. [2021-06-05 14:31:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:30,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:30,008 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:30,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-05 14:31:30,209 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:30,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:30,209 INFO L82 PathProgramCache]: Analyzing trace with hash -786696720, now seen corresponding path program 19 times [2021-06-05 14:31:30,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:30,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612433108] [2021-06-05 14:31:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:30,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:30,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612433108] [2021-06-05 14:31:30,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612433108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244520846] [2021-06-05 14:31:30,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:30,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:30,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:30,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:30,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:30,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:30,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:30,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:30,699 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:30,703 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:30,781 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-05 14:31:30,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:30,783 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:189, output treesize:81 [2021-06-05 14:31:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:30,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244520846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:30,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:30,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:30,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109043453] [2021-06-05 14:31:30,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:30,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:30,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:30,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:30,913 INFO L87 Difference]: Start difference. First operand 428 states and 1310 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,160 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:31:31,507 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-05 14:31:31,694 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-05 14:31:31,831 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 14:31:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:31,855 INFO L93 Difference]: Finished difference Result 664 states and 1911 transitions. [2021-06-05 14:31:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:31,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:31,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:31,856 INFO L225 Difference]: With dead ends: 664 [2021-06-05 14:31:31,856 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 14:31:31,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1131.6ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 14:31:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 430. [2021-06-05 14:31:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.06993006993007) internal successors, (1317), 429 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1317 transitions. [2021-06-05 14:31:31,861 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1317 transitions. Word has length 19 [2021-06-05 14:31:31,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:31,861 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1317 transitions. [2021-06-05 14:31:31,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1317 transitions. [2021-06-05 14:31:31,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:31,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:31,862 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:32,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:32,062 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:32,063 INFO L82 PathProgramCache]: Analyzing trace with hash 792680752, now seen corresponding path program 20 times [2021-06-05 14:31:32,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:32,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021473596] [2021-06-05 14:31:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:32,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:32,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021473596] [2021-06-05 14:31:32,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021473596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:32,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318515817] [2021-06-05 14:31:32,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:32,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:32,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:32,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:32,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:32,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:32,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:32,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:32,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:32,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:32,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:32,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:32,512 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:32,516 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:32,520 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:32,525 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:32,529 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:32,533 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:32,544 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:32,550 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:32,555 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:32,569 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:32,577 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:32,582 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:32,595 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:32,599 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:32,762 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:31:32,762 INFO L628 ElimStorePlain]: treesize reduction 205, result has 46.6 percent of original size [2021-06-05 14:31:32,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:31:32,764 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:807, output treesize:179 [2021-06-05 14:31:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:32,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318515817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:32,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:32,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:32,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807376888] [2021-06-05 14:31:32,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:32,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:32,991 INFO L87 Difference]: Start difference. First operand 430 states and 1317 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:33,692 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 14:31:33,842 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-06-05 14:31:33,996 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2021-06-05 14:31:34,178 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-05 14:31:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:34,183 INFO L93 Difference]: Finished difference Result 709 states and 2045 transitions. [2021-06-05 14:31:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:34,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:34,185 INFO L225 Difference]: With dead ends: 709 [2021-06-05 14:31:34,185 INFO L226 Difference]: Without dead ends: 694 [2021-06-05 14:31:34,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1363.8ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-05 14:31:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 435. [2021-06-05 14:31:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.089861751152074) internal successors, (1341), 434 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1341 transitions. [2021-06-05 14:31:34,190 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1341 transitions. Word has length 19 [2021-06-05 14:31:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:34,190 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1341 transitions. [2021-06-05 14:31:34,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1341 transitions. [2021-06-05 14:31:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:34,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:34,191 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:34,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 14:31:34,391 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2085023152, now seen corresponding path program 21 times [2021-06-05 14:31:34,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:34,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453585820] [2021-06-05 14:31:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:34,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:34,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453585820] [2021-06-05 14:31:34,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453585820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:34,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353257411] [2021-06-05 14:31:34,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:34,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:34,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:34,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:34,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:34,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:34,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:34,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:34,784 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:34,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:34,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:34,801 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:34,806 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:34,811 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:34,816 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:34,821 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:34,826 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:34,832 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:34,837 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:34,843 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:34,854 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:34,859 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:34,864 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:34,869 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:34,873 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:34,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:34,878 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:35,039 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:31:35,040 INFO L628 ElimStorePlain]: treesize reduction 212, result has 45.8 percent of original size [2021-06-05 14:31:35,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:31:35,041 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:179 [2021-06-05 14:31:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:35,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353257411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:35,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:35,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:35,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422696044] [2021-06-05 14:31:35,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:35,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:35,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:35,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:35,342 INFO L87 Difference]: Start difference. First operand 435 states and 1341 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,045 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-05 14:31:36,244 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-05 14:31:36,511 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 14:31:36,742 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 14:31:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:36,791 INFO L93 Difference]: Finished difference Result 683 states and 1966 transitions. [2021-06-05 14:31:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:31:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:36,793 INFO L225 Difference]: With dead ends: 683 [2021-06-05 14:31:36,793 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 14:31:36,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1630.4ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:31:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 14:31:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 431. [2021-06-05 14:31:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0767441860465117) internal successors, (1323), 430 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1323 transitions. [2021-06-05 14:31:36,798 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1323 transitions. Word has length 19 [2021-06-05 14:31:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:36,798 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1323 transitions. [2021-06-05 14:31:36,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1323 transitions. [2021-06-05 14:31:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:36,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:36,798 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:36,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 14:31:36,999 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:36,999 INFO L82 PathProgramCache]: Analyzing trace with hash 82616162, now seen corresponding path program 22 times [2021-06-05 14:31:36,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:36,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145566264] [2021-06-05 14:31:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:37,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:37,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145566264] [2021-06-05 14:31:37,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145566264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:37,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030072283] [2021-06-05 14:31:37,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:37,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:37,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:37,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:37,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:37,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:37,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:37,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:37,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:37,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:37,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:37,442 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:77, output treesize:35 [2021-06-05 14:31:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:37,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030072283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:37,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:37,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:37,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134880613] [2021-06-05 14:31:37,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:37,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:37,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:37,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:37,495 INFO L87 Difference]: Start difference. First operand 431 states and 1323 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,034 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-06-05 14:31:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:38,257 INFO L93 Difference]: Finished difference Result 647 states and 1852 transitions. [2021-06-05 14:31:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:38,257 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:38,258 INFO L225 Difference]: With dead ends: 647 [2021-06-05 14:31:38,258 INFO L226 Difference]: Without dead ends: 618 [2021-06-05 14:31:38,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 887.1ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:31:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-05 14:31:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 438. [2021-06-05 14:31:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.077803203661327) internal successors, (1345), 437 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1345 transitions. [2021-06-05 14:31:38,263 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1345 transitions. Word has length 19 [2021-06-05 14:31:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:38,263 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1345 transitions. [2021-06-05 14:31:38,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1345 transitions. [2021-06-05 14:31:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:38,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:38,263 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:38,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 14:31:38,464 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:38,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1357822156, now seen corresponding path program 23 times [2021-06-05 14:31:38,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:38,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817455594] [2021-06-05 14:31:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:38,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:38,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817455594] [2021-06-05 14:31:38,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817455594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:38,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458762531] [2021-06-05 14:31:38,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:38,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:38,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:38,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:38,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:38,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:38,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:38,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:38,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:38,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:38,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:38,865 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:38,869 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:38,873 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:38,877 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:38,881 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:38,885 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:38,940 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:31:38,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:38,941 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:31:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:39,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458762531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:39,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:39,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:39,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287309821] [2021-06-05 14:31:39,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:39,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:39,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:39,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:39,053 INFO L87 Difference]: Start difference. First operand 438 states and 1345 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:39,997 INFO L93 Difference]: Finished difference Result 680 states and 1939 transitions. [2021-06-05 14:31:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:31:39,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:39,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:39,998 INFO L225 Difference]: With dead ends: 680 [2021-06-05 14:31:39,998 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 14:31:39,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 989.7ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:31:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 14:31:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 435. [2021-06-05 14:31:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.0806451612903225) internal successors, (1337), 434 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1337 transitions. [2021-06-05 14:31:40,003 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1337 transitions. Word has length 19 [2021-06-05 14:31:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:40,003 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1337 transitions. [2021-06-05 14:31:40,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1337 transitions. [2021-06-05 14:31:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:40,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:40,004 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:40,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-05 14:31:40,204 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:40,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:40,204 INFO L82 PathProgramCache]: Analyzing trace with hash 790974380, now seen corresponding path program 24 times [2021-06-05 14:31:40,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:40,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72928037] [2021-06-05 14:31:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:40,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:40,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72928037] [2021-06-05 14:31:40,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72928037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:40,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335594951] [2021-06-05 14:31:40,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:40,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:31:40,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:40,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:40,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:40,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:40,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:40,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:40,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:40,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:40,599 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:40,603 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:40,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:40,610 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:40,614 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:40,618 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:40,621 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:40,678 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:31:40,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:40,679 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:31:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:40,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335594951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:40,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:40,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:40,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904014361] [2021-06-05 14:31:40,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:40,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:40,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:40,803 INFO L87 Difference]: Start difference. First operand 435 states and 1337 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,675 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 14:31:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:41,817 INFO L93 Difference]: Finished difference Result 683 states and 1935 transitions. [2021-06-05 14:31:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:31:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:41,818 INFO L225 Difference]: With dead ends: 683 [2021-06-05 14:31:41,818 INFO L226 Difference]: Without dead ends: 653 [2021-06-05 14:31:41,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1087.3ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:31:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-06-05 14:31:41,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 438. [2021-06-05 14:31:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.0846681922196795) internal successors, (1348), 437 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1348 transitions. [2021-06-05 14:31:41,823 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1348 transitions. Word has length 19 [2021-06-05 14:31:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:41,823 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1348 transitions. [2021-06-05 14:31:41,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1348 transitions. [2021-06-05 14:31:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:41,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:41,824 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:42,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:42,024 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash -702933342, now seen corresponding path program 25 times [2021-06-05 14:31:42,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:42,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118816402] [2021-06-05 14:31:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:42,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:42,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118816402] [2021-06-05 14:31:42,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118816402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:42,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366498775] [2021-06-05 14:31:42,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:42,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:42,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:42,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:42,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:42,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:42,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:42,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:42,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:42,385 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:42,424 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:31:42,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:42,425 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-05 14:31:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:42,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366498775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:42,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:42,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:42,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062997073] [2021-06-05 14:31:42,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:42,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:42,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:42,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:42,495 INFO L87 Difference]: Start difference. First operand 438 states and 1348 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:43,220 INFO L93 Difference]: Finished difference Result 585 states and 1709 transitions. [2021-06-05 14:31:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:31:43,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:43,221 INFO L225 Difference]: With dead ends: 585 [2021-06-05 14:31:43,221 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 14:31:43,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 743.0ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:31:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 14:31:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 438. [2021-06-05 14:31:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.077803203661327) internal successors, (1345), 437 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1345 transitions. [2021-06-05 14:31:43,226 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1345 transitions. Word has length 19 [2021-06-05 14:31:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:43,226 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1345 transitions. [2021-06-05 14:31:43,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1345 transitions. [2021-06-05 14:31:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:43,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:43,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:43,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 14:31:43,430 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:43,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1901193260, now seen corresponding path program 26 times [2021-06-05 14:31:43,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:43,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547336123] [2021-06-05 14:31:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:43,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:43,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547336123] [2021-06-05 14:31:43,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547336123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:43,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959071540] [2021-06-05 14:31:43,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:43,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:43,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:43,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:43,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:43,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:43,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:43,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:43,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:43,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:43,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:43,911 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:43,945 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-05 14:31:43,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:43,946 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:43 [2021-06-05 14:31:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:44,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959071540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:44,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:44,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:44,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633675230] [2021-06-05 14:31:44,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:44,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:44,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:44,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:44,008 INFO L87 Difference]: Start difference. First operand 438 states and 1345 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:44,741 INFO L93 Difference]: Finished difference Result 618 states and 1805 transitions. [2021-06-05 14:31:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:44,741 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:44,742 INFO L225 Difference]: With dead ends: 618 [2021-06-05 14:31:44,742 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 14:31:44,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 834.8ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:31:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 14:31:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 444. [2021-06-05 14:31:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.0880361173814896) internal successors, (1368), 443 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1368 transitions. [2021-06-05 14:31:44,747 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1368 transitions. Word has length 19 [2021-06-05 14:31:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:44,747 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1368 transitions. [2021-06-05 14:31:44,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1368 transitions. [2021-06-05 14:31:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:44,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:44,748 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:44,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-06-05 14:31:44,953 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash 460754942, now seen corresponding path program 27 times [2021-06-05 14:31:44,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:44,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025678636] [2021-06-05 14:31:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:45,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:45,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025678636] [2021-06-05 14:31:45,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025678636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223365720] [2021-06-05 14:31:45,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:45,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:31:45,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:45,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:45,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:45,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:45,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:45,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:45,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:45,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:45,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:45,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:45,338 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:45,341 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:45,345 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:45,348 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:45,351 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:45,402 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:31:45,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:45,403 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:31:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:45,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223365720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:45,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:45,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:45,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877321740] [2021-06-05 14:31:45,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:45,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:45,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:45,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:45,523 INFO L87 Difference]: Start difference. First operand 444 states and 1368 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:46,394 INFO L93 Difference]: Finished difference Result 666 states and 1900 transitions. [2021-06-05 14:31:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:46,395 INFO L225 Difference]: With dead ends: 666 [2021-06-05 14:31:46,395 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 14:31:46,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 929.0ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:31:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 14:31:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 441. [2021-06-05 14:31:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.090909090909091) internal successors, (1360), 440 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1360 transitions. [2021-06-05 14:31:46,402 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1360 transitions. Word has length 19 [2021-06-05 14:31:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:46,402 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1360 transitions. [2021-06-05 14:31:46,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1360 transitions. [2021-06-05 14:31:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:46,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:46,403 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:46,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 14:31:46,617 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:46,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1211007956, now seen corresponding path program 28 times [2021-06-05 14:31:46,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:46,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319966838] [2021-06-05 14:31:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:46,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:46,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319966838] [2021-06-05 14:31:46,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319966838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:46,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797980456] [2021-06-05 14:31:46,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:46,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:46,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:46,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:46,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:47,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:47,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:31:47,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:47,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:47,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:47,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:47,018 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:47,021 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:47,091 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-05 14:31:47,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:31:47,092 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-06-05 14:31:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:47,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797980456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:47,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:47,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:47,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115872905] [2021-06-05 14:31:47,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:47,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:47,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:47,227 INFO L87 Difference]: Start difference. First operand 441 states and 1360 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:47,771 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-05 14:31:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:48,021 INFO L93 Difference]: Finished difference Result 592 states and 1730 transitions. [2021-06-05 14:31:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:48,022 INFO L225 Difference]: With dead ends: 592 [2021-06-05 14:31:48,022 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 14:31:48,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 909.9ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 14:31:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 439. [2021-06-05 14:31:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.084474885844749) internal successors, (1351), 438 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1351 transitions. [2021-06-05 14:31:48,026 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1351 transitions. Word has length 19 [2021-06-05 14:31:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:48,026 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1351 transitions. [2021-06-05 14:31:48,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1351 transitions. [2021-06-05 14:31:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:48,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:48,027 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:48,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-06-05 14:31:48,228 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 368369516, now seen corresponding path program 29 times [2021-06-05 14:31:48,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:48,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135053309] [2021-06-05 14:31:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:48,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:48,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135053309] [2021-06-05 14:31:48,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135053309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:48,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898875907] [2021-06-05 14:31:48,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:48,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:48,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:48,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:48,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:48,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:48,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:48,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:48,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:48,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:48,620 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:48,631 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:48,637 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:48,642 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:48,647 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:48,650 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:48,656 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:48,660 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:48,664 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:48,669 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:48,674 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:48,678 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:48,845 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 14:31:48,846 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 14:31:48,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:31:48,847 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 14:31:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:49,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898875907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:49,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:49,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:49,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352033145] [2021-06-05 14:31:49,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:49,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:49,042 INFO L87 Difference]: Start difference. First operand 439 states and 1351 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,560 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 14:31:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:49,770 INFO L93 Difference]: Finished difference Result 643 states and 1872 transitions. [2021-06-05 14:31:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:49,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:49,771 INFO L225 Difference]: With dead ends: 643 [2021-06-05 14:31:49,771 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 14:31:49,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 903.8ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:49,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 14:31:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 442. [2021-06-05 14:31:49,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0975056689342404) internal successors, (1366), 441 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-06-05 14:31:49,775 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-06-05 14:31:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:49,776 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-06-05 14:31:49,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-06-05 14:31:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:49,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:49,776 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:49,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 14:31:49,981 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:49,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1992707284, now seen corresponding path program 30 times [2021-06-05 14:31:49,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:49,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575011334] [2021-06-05 14:31:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:50,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:50,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575011334] [2021-06-05 14:31:50,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575011334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909139379] [2021-06-05 14:31:50,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:50,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:31:50,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:50,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:50,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:50,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:50,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:50,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:50,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:50,378 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:50,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:50,388 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:50,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:50,396 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:50,400 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:50,404 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:50,408 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:50,412 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:50,416 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:50,419 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:50,423 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:50,581 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:31:50,581 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 14:31:50,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:31:50,583 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-06-05 14:31:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:50,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909139379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:50,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:50,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:50,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157280667] [2021-06-05 14:31:50,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:50,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:50,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:50,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:50,873 INFO L87 Difference]: Start difference. First operand 442 states and 1366 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:51,424 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 14:31:51,572 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 14:31:51,711 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 14:31:51,877 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 14:31:52,006 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 14:31:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:52,102 INFO L93 Difference]: Finished difference Result 626 states and 1833 transitions. [2021-06-05 14:31:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:52,102 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:52,103 INFO L225 Difference]: With dead ends: 626 [2021-06-05 14:31:52,103 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 14:31:52,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1362.2ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:31:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 14:31:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 439. [2021-06-05 14:31:52,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.084474885844749) internal successors, (1351), 438 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1351 transitions. [2021-06-05 14:31:52,109 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1351 transitions. Word has length 19 [2021-06-05 14:31:52,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:52,109 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1351 transitions. [2021-06-05 14:31:52,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1351 transitions. [2021-06-05 14:31:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:52,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:52,110 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:52,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 14:31:52,331 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:52,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:52,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2072973826, now seen corresponding path program 31 times [2021-06-05 14:31:52,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:52,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514664655] [2021-06-05 14:31:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:52,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:52,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514664655] [2021-06-05 14:31:52,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514664655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727892916] [2021-06-05 14:31:52,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:52,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:52,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:52,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:52,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:52,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:52,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:52,738 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:52,742 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:52,746 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:52,750 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:52,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:52,758 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:52,762 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:52,766 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:52,817 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:31:52,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:52,818 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:31:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:52,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727892916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:52,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:52,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:52,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320920802] [2021-06-05 14:31:52,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:52,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:52,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:52,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:52,912 INFO L87 Difference]: Start difference. First operand 439 states and 1351 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:53,667 INFO L93 Difference]: Finished difference Result 657 states and 1908 transitions. [2021-06-05 14:31:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:53,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:53,668 INFO L225 Difference]: With dead ends: 657 [2021-06-05 14:31:53,668 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 14:31:53,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 850.6ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:31:53,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 14:31:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 442. [2021-06-05 14:31:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0975056689342404) internal successors, (1366), 441 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-06-05 14:31:53,675 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-06-05 14:31:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:53,675 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-06-05 14:31:53,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-06-05 14:31:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:53,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:53,676 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:53,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 14:31:53,885 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1321573388, now seen corresponding path program 32 times [2021-06-05 14:31:53,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:53,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188986044] [2021-06-05 14:31:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:54,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:54,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188986044] [2021-06-05 14:31:54,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188986044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993499403] [2021-06-05 14:31:54,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:54,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:54,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:54,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:54,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:54,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:54,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:54,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:54,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:54,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:54,296 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:54,301 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:54,306 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:54,310 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:54,314 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:54,319 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:54,324 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:54,329 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:54,333 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:54,338 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:54,342 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:54,506 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 14:31:54,506 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 14:31:54,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:31:54,508 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 14:31:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:54,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993499403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:54,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:54,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:54,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066696389] [2021-06-05 14:31:54,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:54,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:54,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:54,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:54,705 INFO L87 Difference]: Start difference. First operand 442 states and 1366 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,380 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 14:31:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:55,651 INFO L93 Difference]: Finished difference Result 674 states and 1970 transitions. [2021-06-05 14:31:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:31:55,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:55,652 INFO L225 Difference]: With dead ends: 674 [2021-06-05 14:31:55,652 INFO L226 Difference]: Without dead ends: 659 [2021-06-05 14:31:55,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1050.8ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:31:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-05 14:31:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 447. [2021-06-05 14:31:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.116591928251121) internal successors, (1390), 446 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1390 transitions. [2021-06-05 14:31:55,658 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1390 transitions. Word has length 19 [2021-06-05 14:31:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:55,658 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1390 transitions. [2021-06-05 14:31:55,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1390 transitions. [2021-06-05 14:31:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:55,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:55,659 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:55,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:55,865 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:55,865 INFO L82 PathProgramCache]: Analyzing trace with hash -29230988, now seen corresponding path program 33 times [2021-06-05 14:31:55,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:55,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192229971] [2021-06-05 14:31:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:56,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:56,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192229971] [2021-06-05 14:31:56,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192229971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877016145] [2021-06-05 14:31:56,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:56,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:31:56,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:56,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:56,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:56,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:56,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:56,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:56,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:56,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:56,288 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:56,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:56,298 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:56,303 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:56,307 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:56,311 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:56,316 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:56,321 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:56,325 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:56,330 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:56,334 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:56,338 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:56,509 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 14:31:56,510 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 14:31:56,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:31:56,512 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 14:31:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:56,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877016145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:56,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:56,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:56,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335176334] [2021-06-05 14:31:56,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:56,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:56,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:56,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:56,778 INFO L87 Difference]: Start difference. First operand 447 states and 1390 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,443 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 14:31:57,608 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 14:31:57,759 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 14:31:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:57,913 INFO L93 Difference]: Finished difference Result 648 states and 1904 transitions. [2021-06-05 14:31:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:31:57,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:57,915 INFO L225 Difference]: With dead ends: 648 [2021-06-05 14:31:57,915 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 14:31:57,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1319.4ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:31:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 14:31:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 442. [2021-06-05 14:31:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0975056689342404) internal successors, (1366), 441 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-06-05 14:31:57,919 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-06-05 14:31:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:57,920 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-06-05 14:31:57,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-06-05 14:31:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:57,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:57,920 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:58,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 14:31:58,121 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:58,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1586593584, now seen corresponding path program 34 times [2021-06-05 14:31:58,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:58,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517709941] [2021-06-05 14:31:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:58,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:58,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517709941] [2021-06-05 14:31:58,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517709941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900818884] [2021-06-05 14:31:58,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:58,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:31:58,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:58,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:31:58,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:58,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:58,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:58,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:31:58,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:58,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:31:58,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:31:58,472 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 14:31:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:58,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900818884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:58,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:58,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:58,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202195855] [2021-06-05 14:31:58,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:58,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:58,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:58,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:58,523 INFO L87 Difference]: Start difference. First operand 442 states and 1366 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:31:58,982 INFO L93 Difference]: Finished difference Result 601 states and 1760 transitions. [2021-06-05 14:31:58,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:31:58,982 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:31:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:31:58,983 INFO L225 Difference]: With dead ends: 601 [2021-06-05 14:31:58,983 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 14:31:58,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 557.4ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:31:58,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 14:31:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 452. [2021-06-05 14:31:58,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0931263858093128) internal successors, (1395), 451 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1395 transitions. [2021-06-05 14:31:58,988 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1395 transitions. Word has length 19 [2021-06-05 14:31:58,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:31:58,988 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1395 transitions. [2021-06-05 14:31:58,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:31:58,988 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1395 transitions. [2021-06-05 14:31:58,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:31:58,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:31:58,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:31:59,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:59,189 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:31:59,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:31:59,190 INFO L82 PathProgramCache]: Analyzing trace with hash 146155266, now seen corresponding path program 35 times [2021-06-05 14:31:59,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:31:59,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223754803] [2021-06-05 14:31:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:31:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:31:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:59,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:31:59,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223754803] [2021-06-05 14:31:59,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223754803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716549528] [2021-06-05 14:31:59,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:31:59,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:31:59,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:31:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:31:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:31:59,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:59,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:59,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:31:59,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:59,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:31:59,555 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:59,559 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:59,562 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:31:59,565 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:31:59,568 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:31:59,571 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:31:59,580 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:31:59,630 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:31:59,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:31:59,631 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:31:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:31:59,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716549528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:31:59,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:31:59,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:31:59,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279802361] [2021-06-05 14:31:59,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:31:59,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:31:59,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:31:59,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:31:59,728 INFO L87 Difference]: Start difference. First operand 452 states and 1395 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,195 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-05 14:32:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:00,490 INFO L93 Difference]: Finished difference Result 667 states and 1932 transitions. [2021-06-05 14:32:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:00,490 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:00,491 INFO L225 Difference]: With dead ends: 667 [2021-06-05 14:32:00,491 INFO L226 Difference]: Without dead ends: 637 [2021-06-05 14:32:00,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 877.6ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-05 14:32:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 455. [2021-06-05 14:32:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.0969162995594712) internal successors, (1406), 454 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1406 transitions. [2021-06-05 14:32:00,496 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1406 transitions. Word has length 19 [2021-06-05 14:32:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:00,496 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1406 transitions. [2021-06-05 14:32:00,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1406 transitions. [2021-06-05 14:32:00,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:00,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:00,497 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:00,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-06-05 14:32:00,697 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:00,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2000015494, now seen corresponding path program 36 times [2021-06-05 14:32:00,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:00,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237220283] [2021-06-05 14:32:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:00,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:00,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237220283] [2021-06-05 14:32:00,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237220283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:00,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797786677] [2021-06-05 14:32:00,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:00,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:00,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:00,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:01,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:01,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:01,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:01,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:01,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:01,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:01,116 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:01,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:01,122 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:01,188 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-06-05 14:32:01,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:01,189 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:279, output treesize:61 [2021-06-05 14:32:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:01,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797786677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:01,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:01,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:01,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798008792] [2021-06-05 14:32:01,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:01,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:01,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:01,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:01,292 INFO L87 Difference]: Start difference. First operand 455 states and 1406 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:02,251 INFO L93 Difference]: Finished difference Result 788 states and 2213 transitions. [2021-06-05 14:32:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:02,252 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:02,253 INFO L225 Difference]: With dead ends: 788 [2021-06-05 14:32:02,253 INFO L226 Difference]: Without dead ends: 758 [2021-06-05 14:32:02,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1063.7ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:32:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-05 14:32:02,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 458. [2021-06-05 14:32:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1006564551422318) internal successors, (1417), 457 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1417 transitions. [2021-06-05 14:32:02,258 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1417 transitions. Word has length 19 [2021-06-05 14:32:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:02,258 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1417 transitions. [2021-06-05 14:32:02,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1417 transitions. [2021-06-05 14:32:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:02,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:02,259 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:02,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable784,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:02,460 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:02,460 INFO L82 PathProgramCache]: Analyzing trace with hash 801044080, now seen corresponding path program 37 times [2021-06-05 14:32:02,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:02,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737830561] [2021-06-05 14:32:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:02,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:02,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737830561] [2021-06-05 14:32:02,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737830561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974702323] [2021-06-05 14:32:02,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:02,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:02,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:02,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:02,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:02,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:02,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:02,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:02,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:02,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:02,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:02,885 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:32:02,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:02,886 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:32:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:02,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974702323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:02,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:02,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:02,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656292136] [2021-06-05 14:32:02,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:02,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:02,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:02,956 INFO L87 Difference]: Start difference. First operand 458 states and 1417 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:03,688 INFO L93 Difference]: Finished difference Result 711 states and 2031 transitions. [2021-06-05 14:32:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:32:03,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:03,689 INFO L225 Difference]: With dead ends: 711 [2021-06-05 14:32:03,689 INFO L226 Difference]: Without dead ends: 684 [2021-06-05 14:32:03,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 778.0ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:32:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-05 14:32:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 458. [2021-06-05 14:32:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.0940919037199124) internal successors, (1414), 457 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1414 transitions. [2021-06-05 14:32:03,695 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1414 transitions. Word has length 19 [2021-06-05 14:32:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:03,695 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1414 transitions. [2021-06-05 14:32:03,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1414 transitions. [2021-06-05 14:32:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:03,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:03,696 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:03,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:03,896 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:03,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:03,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1282259270, now seen corresponding path program 38 times [2021-06-05 14:32:03,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:03,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598380097] [2021-06-05 14:32:03,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:04,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:04,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598380097] [2021-06-05 14:32:04,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598380097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820659243] [2021-06-05 14:32:04,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:04,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:04,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:04,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:04,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:04,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:04,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:04,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:04,252 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:04,255 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:04,258 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:04,261 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:04,334 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-05 14:32:04,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:04,335 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:273, output treesize:61 [2021-06-05 14:32:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:04,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820659243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:04,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:04,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:04,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527187013] [2021-06-05 14:32:04,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:04,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:04,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:04,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:04,446 INFO L87 Difference]: Start difference. First operand 458 states and 1414 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,605 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-06-05 14:32:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:05,803 INFO L93 Difference]: Finished difference Result 843 states and 2398 transitions. [2021-06-05 14:32:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:32:05,804 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:05,804 INFO L225 Difference]: With dead ends: 843 [2021-06-05 14:32:05,804 INFO L226 Difference]: Without dead ends: 799 [2021-06-05 14:32:05,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1400.8ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:32:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-05 14:32:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 464. [2021-06-05 14:32:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.101511879049676) internal successors, (1436), 463 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1436 transitions. [2021-06-05 14:32:05,810 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1436 transitions. Word has length 19 [2021-06-05 14:32:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:05,810 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1436 transitions. [2021-06-05 14:32:05,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1436 transitions. [2021-06-05 14:32:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:05,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:05,811 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:06,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-05 14:32:06,011 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:06,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:06,012 INFO L82 PathProgramCache]: Analyzing trace with hash -454876694, now seen corresponding path program 39 times [2021-06-05 14:32:06,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:06,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037921001] [2021-06-05 14:32:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:06,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:06,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037921001] [2021-06-05 14:32:06,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037921001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079944917] [2021-06-05 14:32:06,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:06,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:06,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:06,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:06,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:06,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:06,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:06,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:06,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:06,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:06,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:06,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:06,531 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:32:06,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:06,532 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:32:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:06,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079944917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:06,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:06,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:06,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148070650] [2021-06-05 14:32:06,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:06,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:06,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:06,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:06,599 INFO L87 Difference]: Start difference. First operand 464 states and 1436 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:07,320 INFO L93 Difference]: Finished difference Result 621 states and 1843 transitions. [2021-06-05 14:32:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:32:07,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:07,321 INFO L225 Difference]: With dead ends: 621 [2021-06-05 14:32:07,321 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 14:32:07,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 864.1ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 14:32:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 471. [2021-06-05 14:32:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.108510638297872) internal successors, (1461), 470 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1461 transitions. [2021-06-05 14:32:07,326 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1461 transitions. Word has length 19 [2021-06-05 14:32:07,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:07,326 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1461 transitions. [2021-06-05 14:32:07,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1461 transitions. [2021-06-05 14:32:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:07,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:07,326 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:07,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:07,527 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:07,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1895315012, now seen corresponding path program 40 times [2021-06-05 14:32:07,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:07,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840499990] [2021-06-05 14:32:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:07,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:07,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840499990] [2021-06-05 14:32:07,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840499990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:07,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181270119] [2021-06-05 14:32:07,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:07,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:07,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:07,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:32:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:07,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:07,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:07,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:07,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:07,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:07,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:07,921 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:07,926 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:07,930 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:07,934 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:07,939 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:07,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:07,942 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:08,008 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:32:08,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:08,009 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:426, output treesize:67 [2021-06-05 14:32:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:08,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181270119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:08,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:08,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:08,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422040752] [2021-06-05 14:32:08,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:08,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:08,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:08,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:08,132 INFO L87 Difference]: Start difference. First operand 471 states and 1461 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:08,990 INFO L93 Difference]: Finished difference Result 692 states and 1995 transitions. [2021-06-05 14:32:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:32:08,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:08,991 INFO L225 Difference]: With dead ends: 692 [2021-06-05 14:32:08,991 INFO L226 Difference]: Without dead ends: 649 [2021-06-05 14:32:08,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 962.6ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:32:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-05 14:32:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 474. [2021-06-05 14:32:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.105708245243129) internal successors, (1469), 473 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1469 transitions. [2021-06-05 14:32:08,996 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1469 transitions. Word has length 19 [2021-06-05 14:32:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:08,996 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1469 transitions. [2021-06-05 14:32:08,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1469 transitions. [2021-06-05 14:32:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:08,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:08,997 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:09,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:09,197 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:09,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:09,198 INFO L82 PathProgramCache]: Analyzing trace with hash 253481524, now seen corresponding path program 41 times [2021-06-05 14:32:09,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:09,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102335044] [2021-06-05 14:32:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:09,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:09,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102335044] [2021-06-05 14:32:09,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102335044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489979210] [2021-06-05 14:32:09,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:09,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:09,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:09,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:09,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:09,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:09,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:09,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:09,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:09,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:09,572 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:09,575 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:09,578 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:09,583 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:09,588 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:09,593 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:09,597 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:09,601 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:09,661 INFO L628 ElimStorePlain]: treesize reduction 31, result has 65.6 percent of original size [2021-06-05 14:32:09,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:09,662 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:430, output treesize:59 [2021-06-05 14:32:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:09,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489979210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:09,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:09,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:09,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014408470] [2021-06-05 14:32:09,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:09,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:09,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:09,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:09,762 INFO L87 Difference]: Start difference. First operand 474 states and 1469 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,809 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 14:32:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:10,927 INFO L93 Difference]: Finished difference Result 744 states and 2129 transitions. [2021-06-05 14:32:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:32:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:10,928 INFO L225 Difference]: With dead ends: 744 [2021-06-05 14:32:10,928 INFO L226 Difference]: Without dead ends: 701 [2021-06-05 14:32:10,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1219.1ms TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:32:10,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-05 14:32:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 474. [2021-06-05 14:32:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.105708245243129) internal successors, (1469), 473 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1469 transitions. [2021-06-05 14:32:10,934 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1469 transitions. Word has length 19 [2021-06-05 14:32:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:10,934 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1469 transitions. [2021-06-05 14:32:10,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1469 transitions. [2021-06-05 14:32:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:10,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:10,934 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:11,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-06-05 14:32:11,135 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1363700404, now seen corresponding path program 42 times [2021-06-05 14:32:11,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:11,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409678800] [2021-06-05 14:32:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:11,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:11,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409678800] [2021-06-05 14:32:11,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409678800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437640382] [2021-06-05 14:32:11,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:11,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:11,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:11,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:11,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:11,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:11,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:11,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:11,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:11,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:11,548 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:32:11,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:11,548 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:32:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:11,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437640382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:11,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:11,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:11,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738879407] [2021-06-05 14:32:11,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:11,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:11,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:11,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:11,602 INFO L87 Difference]: Start difference. First operand 474 states and 1469 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:12,312 INFO L93 Difference]: Finished difference Result 646 states and 1910 transitions. [2021-06-05 14:32:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:12,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:12,314 INFO L225 Difference]: With dead ends: 646 [2021-06-05 14:32:12,314 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 14:32:12,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:32:12,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 14:32:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 480. [2021-06-05 14:32:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.11482254697286) internal successors, (1492), 479 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1492 transitions. [2021-06-05 14:32:12,319 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1492 transitions. Word has length 19 [2021-06-05 14:32:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:12,319 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1492 transitions. [2021-06-05 14:32:12,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1492 transitions. [2021-06-05 14:32:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:12,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:12,319 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:12,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable881 [2021-06-05 14:32:12,520 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:12,520 INFO L82 PathProgramCache]: Analyzing trace with hash -76737914, now seen corresponding path program 43 times [2021-06-05 14:32:12,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:12,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205691086] [2021-06-05 14:32:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:12,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:12,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205691086] [2021-06-05 14:32:12,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205691086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:12,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151069988] [2021-06-05 14:32:12,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:12,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:32:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:12,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:12,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:12,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:12,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:12,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:12,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:12,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:12,928 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:12,931 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:12,935 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:12,996 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:32:12,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:12,997 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 14:32:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:13,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151069988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:13,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:13,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:13,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823704917] [2021-06-05 14:32:13,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:13,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:13,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:13,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:13,102 INFO L87 Difference]: Start difference. First operand 480 states and 1492 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:13,898 INFO L93 Difference]: Finished difference Result 694 states and 1999 transitions. [2021-06-05 14:32:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:13,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:13,899 INFO L225 Difference]: With dead ends: 694 [2021-06-05 14:32:13,899 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 14:32:13,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 911.8ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 14:32:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 477. [2021-06-05 14:32:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1176470588235294) internal successors, (1484), 476 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1484 transitions. [2021-06-05 14:32:13,904 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1484 transitions. Word has length 19 [2021-06-05 14:32:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:13,904 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1484 transitions. [2021-06-05 14:32:13,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1484 transitions. [2021-06-05 14:32:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:13,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:13,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:14,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-06-05 14:32:14,105 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:14,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:14,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1748500812, now seen corresponding path program 44 times [2021-06-05 14:32:14,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:14,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171316157] [2021-06-05 14:32:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:14,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:14,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171316157] [2021-06-05 14:32:14,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171316157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412036020] [2021-06-05 14:32:14,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:14,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:14,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:14,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:14,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:14,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:14,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:14,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:14,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:14,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:14,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:14,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:14,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:14,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:14,536 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:14,539 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:14,542 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:14,623 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-06-05 14:32:14,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:32:14,624 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-06-05 14:32:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:14,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412036020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:14,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:14,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:14,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530556367] [2021-06-05 14:32:14,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:14,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:14,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:14,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:14,758 INFO L87 Difference]: Start difference. First operand 477 states and 1484 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,254 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 14:32:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:15,739 INFO L93 Difference]: Finished difference Result 653 states and 1948 transitions. [2021-06-05 14:32:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:15,740 INFO L225 Difference]: With dead ends: 653 [2021-06-05 14:32:15,740 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 14:32:15,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1030.1ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:15,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 14:32:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 477. [2021-06-05 14:32:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1176470588235294) internal successors, (1484), 476 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1484 transitions. [2021-06-05 14:32:15,745 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1484 transitions. Word has length 19 [2021-06-05 14:32:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:15,746 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1484 transitions. [2021-06-05 14:32:15,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1484 transitions. [2021-06-05 14:32:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:15,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:15,746 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:15,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:15,947 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:15,947 INFO L82 PathProgramCache]: Analyzing trace with hash -169123340, now seen corresponding path program 45 times [2021-06-05 14:32:15,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:15,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088615134] [2021-06-05 14:32:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:16,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:16,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088615134] [2021-06-05 14:32:16,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088615134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:16,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865353222] [2021-06-05 14:32:16,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:16,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:16,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:16,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:16,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:16,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:16,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:16,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:16,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:16,322 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:16,328 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:16,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:16,338 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:16,343 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:16,347 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:16,352 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:16,356 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:16,360 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:16,364 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:16,368 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:16,372 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:16,376 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:16,380 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:16,384 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:16,388 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:16,392 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:16,395 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:16,557 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:32:16,557 INFO L628 ElimStorePlain]: treesize reduction 212, result has 45.8 percent of original size [2021-06-05 14:32:16,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:32:16,559 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:179 [2021-06-05 14:32:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:16,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865353222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:16,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:16,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:16,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444102120] [2021-06-05 14:32:16,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:16,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:16,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:16,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:16,771 INFO L87 Difference]: Start difference. First operand 477 states and 1484 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,299 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 14:32:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:17,539 INFO L93 Difference]: Finished difference Result 696 states and 2047 transitions. [2021-06-05 14:32:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:17,540 INFO L225 Difference]: With dead ends: 696 [2021-06-05 14:32:17,540 INFO L226 Difference]: Without dead ends: 681 [2021-06-05 14:32:17,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 915.6ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-05 14:32:17,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 482. [2021-06-05 14:32:17,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.135135135135135) internal successors, (1508), 481 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1508 transitions. [2021-06-05 14:32:17,545 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1508 transitions. Word has length 19 [2021-06-05 14:32:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:17,545 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1508 transitions. [2021-06-05 14:32:17,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1508 transitions. [2021-06-05 14:32:17,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:17,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:17,546 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:17,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:17,746 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1123219060, now seen corresponding path program 46 times [2021-06-05 14:32:17,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:17,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469185950] [2021-06-05 14:32:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:17,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:17,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469185950] [2021-06-05 14:32:17,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469185950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:17,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845479793] [2021-06-05 14:32:17,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:17,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:17,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:17,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:32:17,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:18,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:18,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:18,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:18,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:18,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:18,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:18,158 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:18,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:18,167 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:18,171 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:18,177 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:18,181 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:18,192 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:18,197 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:18,201 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:18,206 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:18,210 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:18,214 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:18,218 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:18,468 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-05 14:32:18,468 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-06-05 14:32:18,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:32:18,471 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-05 14:32:18,602 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 14:32:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:18,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845479793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:18,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:18,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:18,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141688031] [2021-06-05 14:32:18,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:18,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:18,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:18,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:18,826 INFO L87 Difference]: Start difference. First operand 482 states and 1508 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:19,427 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-05 14:32:19,699 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-05 14:32:19,905 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:32:20,037 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-05 14:32:20,231 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-06-05 14:32:20,435 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 14:32:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:20,552 INFO L93 Difference]: Finished difference Result 686 states and 2025 transitions. [2021-06-05 14:32:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:32:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:20,553 INFO L225 Difference]: With dead ends: 686 [2021-06-05 14:32:20,553 INFO L226 Difference]: Without dead ends: 664 [2021-06-05 14:32:20,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1940.4ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:32:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-05 14:32:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 478. [2021-06-05 14:32:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1236897274633124) internal successors, (1490), 477 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1490 transitions. [2021-06-05 14:32:20,559 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1490 transitions. Word has length 19 [2021-06-05 14:32:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:20,559 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1490 transitions. [2021-06-05 14:32:20,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1490 transitions. [2021-06-05 14:32:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:20,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:20,560 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:20,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable944,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:20,760 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1684500614, now seen corresponding path program 47 times [2021-06-05 14:32:20,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:20,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087470764] [2021-06-05 14:32:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:20,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:20,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087470764] [2021-06-05 14:32:20,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087470764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:20,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125445375] [2021-06-05 14:32:20,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:20,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:20,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:20,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:21,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:21,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:21,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:21,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:21,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:21,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:21,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:21,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:21,169 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:21,172 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:21,176 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:21,178 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:21,229 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:32:21,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:21,230 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:32:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:21,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125445375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:21,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:21,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:21,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489145397] [2021-06-05 14:32:21,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:21,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:21,332 INFO L87 Difference]: Start difference. First operand 478 states and 1490 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:22,278 INFO L93 Difference]: Finished difference Result 706 states and 2077 transitions. [2021-06-05 14:32:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:22,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:22,279 INFO L225 Difference]: With dead ends: 706 [2021-06-05 14:32:22,279 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 14:32:22,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 967.5ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 14:32:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 481. [2021-06-05 14:32:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.1354166666666665) internal successors, (1505), 480 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1505 transitions. [2021-06-05 14:32:22,285 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1505 transitions. Word has length 19 [2021-06-05 14:32:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:22,285 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1505 transitions. [2021-06-05 14:32:22,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1505 transitions. [2021-06-05 14:32:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:22,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:22,286 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:22,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 14:32:22,486 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1859066244, now seen corresponding path program 48 times [2021-06-05 14:32:22,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:22,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008643532] [2021-06-05 14:32:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:22,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:22,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008643532] [2021-06-05 14:32:22,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008643532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:22,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137937081] [2021-06-05 14:32:22,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:22,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:22,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:22,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:22,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:22,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:22,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:22,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:22,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:22,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:22,891 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:22,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:22,899 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:22,904 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:22,907 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:22,911 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:22,915 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:22,919 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:22,923 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:22,927 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:22,931 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:22,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:22,934 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:23,093 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:32:23,093 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 14:32:23,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:32:23,095 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-05 14:32:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:23,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137937081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:23,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:23,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:23,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792567865] [2021-06-05 14:32:23,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:23,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:23,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:23,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:23,319 INFO L87 Difference]: Start difference. First operand 481 states and 1505 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:23,868 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 14:32:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:24,084 INFO L93 Difference]: Finished difference Result 682 states and 2026 transitions. [2021-06-05 14:32:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:24,085 INFO L225 Difference]: With dead ends: 682 [2021-06-05 14:32:24,085 INFO L226 Difference]: Without dead ends: 667 [2021-06-05 14:32:24,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 931.1ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:32:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-06-05 14:32:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 484. [2021-06-05 14:32:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1469979296066253) internal successors, (1520), 483 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1520 transitions. [2021-06-05 14:32:24,090 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1520 transitions. Word has length 19 [2021-06-05 14:32:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:24,091 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1520 transitions. [2021-06-05 14:32:24,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1520 transitions. [2021-06-05 14:32:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:24,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:24,091 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:24,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 14:32:24,292 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:24,292 INFO L82 PathProgramCache]: Analyzing trace with hash -566723844, now seen corresponding path program 49 times [2021-06-05 14:32:24,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:24,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723208006] [2021-06-05 14:32:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:24,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:24,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723208006] [2021-06-05 14:32:24,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723208006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:24,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947555453] [2021-06-05 14:32:24,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:24,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:24,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:24,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:24,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:24,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:24,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:24,632 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:24,636 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:24,640 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:24,644 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:24,648 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:24,651 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:24,656 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:24,659 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:24,663 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:24,674 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:24,678 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:24,682 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:24,834 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 14:32:24,835 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 14:32:24,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:32:24,837 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 14:32:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:25,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947555453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:25,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:25,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:25,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218894321] [2021-06-05 14:32:25,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:25,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:25,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:25,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:25,082 INFO L87 Difference]: Start difference. First operand 484 states and 1520 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:25,662 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 14:32:25,814 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 14:32:25,964 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 14:32:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:26,132 INFO L93 Difference]: Finished difference Result 690 states and 2041 transitions. [2021-06-05 14:32:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:26,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:26,133 INFO L225 Difference]: With dead ends: 690 [2021-06-05 14:32:26,133 INFO L226 Difference]: Without dead ends: 675 [2021-06-05 14:32:26,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1186.6ms TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-05 14:32:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 483. [2021-06-05 14:32:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.141078838174274) internal successors, (1514), 482 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1514 transitions. [2021-06-05 14:32:26,139 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1514 transitions. Word has length 19 [2021-06-05 14:32:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:26,139 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1514 transitions. [2021-06-05 14:32:26,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1514 transitions. [2021-06-05 14:32:26,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:26,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:26,140 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:26,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-05 14:32:26,343 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:26,343 INFO L82 PathProgramCache]: Analyzing trace with hash 541213654, now seen corresponding path program 50 times [2021-06-05 14:32:26,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:26,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738219690] [2021-06-05 14:32:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:26,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:26,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738219690] [2021-06-05 14:32:26,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738219690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:26,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926635619] [2021-06-05 14:32:26,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:26,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:26,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:26,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:26,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:26,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:26,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:26,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:26,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:26,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:26,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:26,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:26,805 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:26,809 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:26,812 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:26,815 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:26,819 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:26,822 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:26,904 INFO L628 ElimStorePlain]: treesize reduction 67, result has 58.9 percent of original size [2021-06-05 14:32:26,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:32:26,906 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:332, output treesize:96 [2021-06-05 14:32:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:27,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926635619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:27,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:27,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:27,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423550803] [2021-06-05 14:32:27,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:27,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:27,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:27,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:27,023 INFO L87 Difference]: Start difference. First operand 483 states and 1514 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:27,578 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 14:32:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:28,076 INFO L93 Difference]: Finished difference Result 659 states and 1970 transitions. [2021-06-05 14:32:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:28,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:28,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:28,077 INFO L225 Difference]: With dead ends: 659 [2021-06-05 14:32:28,077 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 14:32:28,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1091.6ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 14:32:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 478. [2021-06-05 14:32:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1236897274633124) internal successors, (1490), 477 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1490 transitions. [2021-06-05 14:32:28,083 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1490 transitions. Word has length 19 [2021-06-05 14:32:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:28,083 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1490 transitions. [2021-06-05 14:32:28,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1490 transitions. [2021-06-05 14:32:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:28,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:28,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:28,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-06-05 14:32:28,305 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:28,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1600789196, now seen corresponding path program 51 times [2021-06-05 14:32:28,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:28,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050163105] [2021-06-05 14:32:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:28,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:28,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050163105] [2021-06-05 14:32:28,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050163105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:28,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805287302] [2021-06-05 14:32:28,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:28,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:32:28,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:28,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:32:28,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:28,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:28,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:28,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:28,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:28,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:28,736 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:28,739 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:28,743 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:28,747 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:28,750 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:28,754 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:28,757 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:28,760 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:28,825 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 14:32:28,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:28,826 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 14:32:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:28,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805287302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:28,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:28,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:28,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452098825] [2021-06-05 14:32:28,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:28,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:28,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:28,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:28,935 INFO L87 Difference]: Start difference. First operand 478 states and 1490 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:29,659 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 14:32:29,982 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-06-05 14:32:30,130 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-06-05 14:32:30,261 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-05 14:32:30,400 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-06-05 14:32:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:30,422 INFO L93 Difference]: Finished difference Result 841 states and 2433 transitions. [2021-06-05 14:32:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:30,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:30,423 INFO L225 Difference]: With dead ends: 841 [2021-06-05 14:32:30,423 INFO L226 Difference]: Without dead ends: 792 [2021-06-05 14:32:30,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1604.7ms TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:32:30,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-06-05 14:32:30,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 490. [2021-06-05 14:32:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.132924335378323) internal successors, (1532), 489 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-06-05 14:32:30,433 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-06-05 14:32:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:30,433 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-06-05 14:32:30,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:30,433 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-06-05 14:32:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:30,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:30,434 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:30,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:30,634 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash 411566906, now seen corresponding path program 52 times [2021-06-05 14:32:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:30,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086561161] [2021-06-05 14:32:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:30,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:30,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086561161] [2021-06-05 14:32:30,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086561161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:30,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668521986] [2021-06-05 14:32:30,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:30,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:30,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:31,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:31,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:31,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:31,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:31,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:31,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:31,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:31,027 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:31,030 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:31,034 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:31,037 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:31,040 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:31,090 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:32:31,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:31,091 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:32:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:31,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668521986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:31,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:31,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:31,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497248651] [2021-06-05 14:32:31,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:31,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:31,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:31,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:31,187 INFO L87 Difference]: Start difference. First operand 490 states and 1532 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:31,784 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 14:32:32,026 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 14:32:32,199 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 14:32:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:32,234 INFO L93 Difference]: Finished difference Result 795 states and 2337 transitions. [2021-06-05 14:32:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:32,234 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:32,235 INFO L225 Difference]: With dead ends: 795 [2021-06-05 14:32:32,235 INFO L226 Difference]: Without dead ends: 765 [2021-06-05 14:32:32,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1083.4ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:32,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-06-05 14:32:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 493. [2021-06-05 14:32:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.144308943089431) internal successors, (1547), 492 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1547 transitions. [2021-06-05 14:32:32,242 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1547 transitions. Word has length 19 [2021-06-05 14:32:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:32,242 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1547 transitions. [2021-06-05 14:32:32,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1547 transitions. [2021-06-05 14:32:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:32,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:32,243 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:32,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1059,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:32,457 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1162967344, now seen corresponding path program 53 times [2021-06-05 14:32:32,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:32,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618646424] [2021-06-05 14:32:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:32,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618646424] [2021-06-05 14:32:32,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618646424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687353585] [2021-06-05 14:32:32,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:32,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:32,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:32,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:32,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:32,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:32,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:32,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:32,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:32,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:32,841 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:32,846 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:32,850 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:32,854 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:32,859 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:32,863 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:32,867 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:32,871 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:32,875 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:32,879 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:32,883 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:32,887 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:32,891 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:32,895 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:32,899 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:32,902 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:32,906 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:32,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:32,910 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:33,069 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:32:33,069 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-05 14:32:33,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:32:33,071 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-05 14:32:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:33,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687353585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:33,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:33,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:33,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384996718] [2021-06-05 14:32:33,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:33,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:33,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:33,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:33,270 INFO L87 Difference]: Start difference. First operand 493 states and 1547 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:33,888 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 14:32:34,029 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-06-05 14:32:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:34,196 INFO L93 Difference]: Finished difference Result 784 states and 2326 transitions. [2021-06-05 14:32:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:34,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:34,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:34,197 INFO L225 Difference]: With dead ends: 784 [2021-06-05 14:32:34,197 INFO L226 Difference]: Without dead ends: 769 [2021-06-05 14:32:34,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1072.7ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-05 14:32:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 498. [2021-06-05 14:32:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.160965794768612) internal successors, (1571), 497 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1571 transitions. [2021-06-05 14:32:34,203 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1571 transitions. Word has length 19 [2021-06-05 14:32:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:34,203 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1571 transitions. [2021-06-05 14:32:34,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1571 transitions. [2021-06-05 14:32:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:34,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:34,204 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:34,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-05 14:32:34,404 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:34,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1839657552, now seen corresponding path program 54 times [2021-06-05 14:32:34,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:34,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034368176] [2021-06-05 14:32:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:34,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:34,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034368176] [2021-06-05 14:32:34,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034368176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:34,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968878448] [2021-06-05 14:32:34,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:34,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:34,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:34,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:34,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:34,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:34,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:34,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:34,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:34,814 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:34,819 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:34,822 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:34,826 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:34,831 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:34,835 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:34,839 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:34,863 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:34,867 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:34,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:34,871 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:35,030 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:32:35,031 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 14:32:35,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:32:35,032 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-05 14:32:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:35,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968878448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:35,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:35,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:35,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147114493] [2021-06-05 14:32:35,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:35,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:35,304 INFO L87 Difference]: Start difference. First operand 498 states and 1571 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:35,893 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 14:32:36,200 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 14:32:36,435 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 14:32:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:36,461 INFO L93 Difference]: Finished difference Result 776 states and 2291 transitions. [2021-06-05 14:32:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:32:36,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:36,462 INFO L225 Difference]: With dead ends: 776 [2021-06-05 14:32:36,462 INFO L226 Difference]: Without dead ends: 761 [2021-06-05 14:32:36,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1389.2ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-05 14:32:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 495. [2021-06-05 14:32:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.1497975708502026) internal successors, (1556), 494 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1556 transitions. [2021-06-05 14:32:36,468 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1556 transitions. Word has length 19 [2021-06-05 14:32:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:36,468 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1556 transitions. [2021-06-05 14:32:36,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1556 transitions. [2021-06-05 14:32:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:36,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:36,468 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:36,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:36,669 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:36,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1233511390, now seen corresponding path program 55 times [2021-06-05 14:32:36,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:36,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411220237] [2021-06-05 14:32:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:36,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:36,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411220237] [2021-06-05 14:32:36,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411220237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:36,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133701548] [2021-06-05 14:32:36,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:36,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:36,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:37,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:37,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:37,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:37,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:37,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:37,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:37,086 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:37,090 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:37,093 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:37,096 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:37,100 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:37,103 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:37,106 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:37,109 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:37,190 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-06-05 14:32:37,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:32:37,191 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:369, output treesize:96 [2021-06-05 14:32:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:37,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133701548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:37,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:37,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:37,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164707910] [2021-06-05 14:32:37,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:37,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:37,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:37,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:37,322 INFO L87 Difference]: Start difference. First operand 495 states and 1556 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:37,860 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 14:32:38,005 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 14:32:38,194 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 14:32:38,366 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 14:32:38,505 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 14:32:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:38,548 INFO L93 Difference]: Finished difference Result 776 states and 2307 transitions. [2021-06-05 14:32:38,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:38,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:38,550 INFO L225 Difference]: With dead ends: 776 [2021-06-05 14:32:38,550 INFO L226 Difference]: Without dead ends: 761 [2021-06-05 14:32:38,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1283.2ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-05 14:32:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 490. [2021-06-05 14:32:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.132924335378323) internal successors, (1532), 489 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-06-05 14:32:38,555 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-06-05 14:32:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:38,556 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-06-05 14:32:38,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-06-05 14:32:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:38,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:38,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:38,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-06-05 14:32:38,757 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:38,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1833437172, now seen corresponding path program 56 times [2021-06-05 14:32:38,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:38,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610043699] [2021-06-05 14:32:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:38,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:38,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610043699] [2021-06-05 14:32:38,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610043699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:38,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358147359] [2021-06-05 14:32:38,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:38,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:38,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:38,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:39,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:39,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:39,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:39,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:39,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:39,126 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:32:39,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:39,127 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:32:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:39,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358147359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:39,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:39,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:39,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100752493] [2021-06-05 14:32:39,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:39,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:39,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:39,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:39,182 INFO L87 Difference]: Start difference. First operand 490 states and 1532 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:40,061 INFO L93 Difference]: Finished difference Result 730 states and 2163 transitions. [2021-06-05 14:32:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:32:40,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:40,063 INFO L225 Difference]: With dead ends: 730 [2021-06-05 14:32:40,063 INFO L226 Difference]: Without dead ends: 683 [2021-06-05 14:32:40,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 942.5ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:32:40,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-05 14:32:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 490. [2021-06-05 14:32:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.132924335378323) internal successors, (1532), 489 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-06-05 14:32:40,068 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-06-05 14:32:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:40,068 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-06-05 14:32:40,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:40,068 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-06-05 14:32:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:40,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:40,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:40,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-05 14:32:40,269 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:40,270 INFO L82 PathProgramCache]: Analyzing trace with hash -903319062, now seen corresponding path program 57 times [2021-06-05 14:32:40,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:40,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913196914] [2021-06-05 14:32:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:40,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:40,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913196914] [2021-06-05 14:32:40,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913196914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:40,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561120666] [2021-06-05 14:32:40,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:40,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:40,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:40,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:40,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:40,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:40,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:40,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:40,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:40,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:40,625 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:40,627 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:40,630 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:40,669 INFO L628 ElimStorePlain]: treesize reduction 65, result has 39.8 percent of original size [2021-06-05 14:32:40,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:40,670 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:240, output treesize:43 [2021-06-05 14:32:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:40,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561120666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:40,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:40,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:40,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840333864] [2021-06-05 14:32:40,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:40,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:40,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:40,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:40,724 INFO L87 Difference]: Start difference. First operand 490 states and 1532 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:41,209 INFO L93 Difference]: Finished difference Result 714 states and 2115 transitions. [2021-06-05 14:32:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:32:41,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:41,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:41,210 INFO L225 Difference]: With dead ends: 714 [2021-06-05 14:32:41,210 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 14:32:41,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:32:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 14:32:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 493. [2021-06-05 14:32:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.130081300813008) internal successors, (1540), 492 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1540 transitions. [2021-06-05 14:32:41,216 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1540 transitions. Word has length 19 [2021-06-05 14:32:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:41,216 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1540 transitions. [2021-06-05 14:32:41,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1540 transitions. [2021-06-05 14:32:41,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:41,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:41,216 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:41,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-06-05 14:32:41,417 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1951209916, now seen corresponding path program 58 times [2021-06-05 14:32:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:41,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564421878] [2021-06-05 14:32:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:41,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564421878] [2021-06-05 14:32:41,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564421878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021839930] [2021-06-05 14:32:41,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:41,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:41,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:32:41,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:41,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:41,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:41,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:41,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:41,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:41,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:41,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:41,758 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:41,762 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:41,765 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:41,768 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:41,772 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:41,775 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:41,840 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 14:32:41,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:41,841 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 14:32:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:41,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021839930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:41,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:41,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:41,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314891760] [2021-06-05 14:32:41,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:41,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:41,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:41,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:41,946 INFO L87 Difference]: Start difference. First operand 493 states and 1540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:42,474 INFO L93 Difference]: Finished difference Result 738 states and 2163 transitions. [2021-06-05 14:32:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:32:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:42,476 INFO L225 Difference]: With dead ends: 738 [2021-06-05 14:32:42,476 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 14:32:42,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 616.2ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:32:42,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 14:32:42,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 493. [2021-06-05 14:32:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.130081300813008) internal successors, (1540), 492 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1540 transitions. [2021-06-05 14:32:42,481 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1540 transitions. Word has length 19 [2021-06-05 14:32:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:42,481 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1540 transitions. [2021-06-05 14:32:42,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:42,481 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1540 transitions. [2021-06-05 14:32:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:42,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:42,482 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:42,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1159,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:42,682 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash -194960844, now seen corresponding path program 59 times [2021-06-05 14:32:42,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:42,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068828169] [2021-06-05 14:32:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:42,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:42,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068828169] [2021-06-05 14:32:42,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068828169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:42,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685016026] [2021-06-05 14:32:42,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:42,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:32:42,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:42,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:42,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:42,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:42,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:42,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 14:32:42,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:42,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:42,979 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:42,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:42,987 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:42,991 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:42,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:42,995 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:43,062 INFO L628 ElimStorePlain]: treesize reduction 52, result has 53.2 percent of original size [2021-06-05 14:32:43,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:43,063 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:307, output treesize:59 [2021-06-05 14:32:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:43,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685016026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:43,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:43,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:32:43,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790217580] [2021-06-05 14:32:43,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:32:43,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:32:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:32:43,154 INFO L87 Difference]: Start difference. First operand 493 states and 1540 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:43,597 INFO L93 Difference]: Finished difference Result 705 states and 2093 transitions. [2021-06-05 14:32:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:32:43,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:43,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:43,598 INFO L225 Difference]: With dead ends: 705 [2021-06-05 14:32:43,598 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 14:32:43,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:32:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 14:32:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 496. [2021-06-05 14:32:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.1333333333333333) internal successors, (1551), 495 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1551 transitions. [2021-06-05 14:32:43,604 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1551 transitions. Word has length 19 [2021-06-05 14:32:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:43,604 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1551 transitions. [2021-06-05 14:32:43,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1551 transitions. [2021-06-05 14:32:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:43,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:43,604 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:43,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:43,805 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:43,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:43,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1920214934, now seen corresponding path program 60 times [2021-06-05 14:32:43,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:43,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398225514] [2021-06-05 14:32:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:43,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398225514] [2021-06-05 14:32:43,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398225514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583249418] [2021-06-05 14:32:43,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:44,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:32:44,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:44,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:44,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:44,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:44,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:44,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:44,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:44,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:44,182 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:44,185 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:44,221 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 14:32:44,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:44,221 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 14:32:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:44,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583249418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:44,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:44,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:44,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780902095] [2021-06-05 14:32:44,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:44,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:44,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:44,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:44,278 INFO L87 Difference]: Start difference. First operand 496 states and 1551 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:44,903 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2021-06-05 14:32:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:45,452 INFO L93 Difference]: Finished difference Result 975 states and 2783 transitions. [2021-06-05 14:32:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:32:45,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:45,454 INFO L225 Difference]: With dead ends: 975 [2021-06-05 14:32:45,454 INFO L226 Difference]: Without dead ends: 913 [2021-06-05 14:32:45,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1226.2ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:32:45,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-05 14:32:45,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 502. [2021-06-05 14:32:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.143712574850299) internal successors, (1575), 501 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1575 transitions. [2021-06-05 14:32:45,460 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1575 transitions. Word has length 19 [2021-06-05 14:32:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:45,460 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1575 transitions. [2021-06-05 14:32:45,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1575 transitions. [2021-06-05 14:32:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:45,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:45,461 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:45,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:45,662 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:45,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1459737962, now seen corresponding path program 61 times [2021-06-05 14:32:45,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:45,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662950340] [2021-06-05 14:32:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:45,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:45,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662950340] [2021-06-05 14:32:45,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662950340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:45,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863654207] [2021-06-05 14:32:45,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:45,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:32:45,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:46,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:46,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:46,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:46,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:46,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:46,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:46,084 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 14:32:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:46,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863654207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:46,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:46,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:46,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348084353] [2021-06-05 14:32:46,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:46,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:46,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:46,137 INFO L87 Difference]: Start difference. First operand 502 states and 1575 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:46,408 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:32:46,599 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-05 14:32:46,803 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 14:32:46,934 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-06-05 14:32:47,147 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 14:32:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:47,166 INFO L93 Difference]: Finished difference Result 843 states and 2462 transitions. [2021-06-05 14:32:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:32:47,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:47,167 INFO L225 Difference]: With dead ends: 843 [2021-06-05 14:32:47,167 INFO L226 Difference]: Without dead ends: 814 [2021-06-05 14:32:47,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1117.8ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-06-05 14:32:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 502. [2021-06-05 14:32:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.143712574850299) internal successors, (1575), 501 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1575 transitions. [2021-06-05 14:32:47,173 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1575 transitions. Word has length 19 [2021-06-05 14:32:47,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:47,174 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1575 transitions. [2021-06-05 14:32:47,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1575 transitions. [2021-06-05 14:32:47,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:47,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:47,174 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:47,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1204,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:47,375 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:47,375 INFO L82 PathProgramCache]: Analyzing trace with hash 692891814, now seen corresponding path program 62 times [2021-06-05 14:32:47,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:47,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834130255] [2021-06-05 14:32:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:47,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:47,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834130255] [2021-06-05 14:32:47,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834130255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:47,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358524860] [2021-06-05 14:32:47,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:47,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:47,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:47,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:47,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:47,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:47,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:47,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:47,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:47,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:47,748 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:47,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:47,755 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:47,762 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:47,765 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:47,769 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:47,772 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:47,855 INFO L628 ElimStorePlain]: treesize reduction 105, result has 45.9 percent of original size [2021-06-05 14:32:47,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:32:47,857 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:328, output treesize:89 [2021-06-05 14:32:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:47,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358524860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:47,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:47,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:47,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029144215] [2021-06-05 14:32:47,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:47,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:47,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:47,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:47,974 INFO L87 Difference]: Start difference. First operand 502 states and 1575 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:48,590 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-05 14:32:48,759 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 14:32:48,989 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 14:32:49,115 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 14:32:49,315 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 14:32:49,485 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 14:32:49,664 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-05 14:32:49,821 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-05 14:32:49,977 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 14:32:50,111 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 14:32:50,311 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-05 14:32:50,594 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 14:32:50,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:50,606 INFO L93 Difference]: Finished difference Result 990 states and 2847 transitions. [2021-06-05 14:32:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:32:50,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:50,608 INFO L225 Difference]: With dead ends: 990 [2021-06-05 14:32:50,608 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 14:32:50,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2596.7ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:32:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 14:32:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 501. [2021-06-05 14:32:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.152) internal successors, (1576), 500 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1576 transitions. [2021-06-05 14:32:50,615 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1576 transitions. Word has length 19 [2021-06-05 14:32:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:50,615 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1576 transitions. [2021-06-05 14:32:50,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1576 transitions. [2021-06-05 14:32:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:50,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:50,616 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:50,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:50,816 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash 168702634, now seen corresponding path program 63 times [2021-06-05 14:32:50,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:50,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720178370] [2021-06-05 14:32:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:50,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720178370] [2021-06-05 14:32:50,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720178370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784574888] [2021-06-05 14:32:50,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:51,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:51,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:51,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:51,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:51,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:51,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:51,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:51,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:51,219 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:51,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:51,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:51,260 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-05 14:32:51,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:51,260 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-05 14:32:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:51,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784574888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:51,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:51,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:51,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007691644] [2021-06-05 14:32:51,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:51,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:51,318 INFO L87 Difference]: Start difference. First operand 501 states and 1576 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,179 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-05 14:32:52,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:52,236 INFO L93 Difference]: Finished difference Result 879 states and 2585 transitions. [2021-06-05 14:32:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:32:52,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:52,237 INFO L225 Difference]: With dead ends: 879 [2021-06-05 14:32:52,238 INFO L226 Difference]: Without dead ends: 850 [2021-06-05 14:32:52,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 935.9ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:32:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-05 14:32:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 501. [2021-06-05 14:32:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.152) internal successors, (1576), 500 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1576 transitions. [2021-06-05 14:32:52,244 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1576 transitions. Word has length 19 [2021-06-05 14:32:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:52,244 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1576 transitions. [2021-06-05 14:32:52,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1576 transitions. [2021-06-05 14:32:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:52,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:52,244 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:52,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1232 [2021-06-05 14:32:52,445 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:52,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2074185700, now seen corresponding path program 64 times [2021-06-05 14:32:52,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:52,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747258726] [2021-06-05 14:32:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:52,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:52,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747258726] [2021-06-05 14:32:52,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747258726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:52,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633503926] [2021-06-05 14:32:52,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:52,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:32:52,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:52,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:32:52,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:52,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:52,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:52,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:52,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:52,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:52,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:52,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 14:32:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:52,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633503926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:52,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:52,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:52,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015529640] [2021-06-05 14:32:52,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:52,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:52,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:52,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:52,847 INFO L87 Difference]: Start difference. First operand 501 states and 1576 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:53,395 INFO L93 Difference]: Finished difference Result 766 states and 2250 transitions. [2021-06-05 14:32:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:32:53,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:53,396 INFO L225 Difference]: With dead ends: 766 [2021-06-05 14:32:53,396 INFO L226 Difference]: Without dead ends: 737 [2021-06-05 14:32:53,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:32:53,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-05 14:32:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 505. [2021-06-05 14:32:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1547619047619047) internal successors, (1590), 504 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1590 transitions. [2021-06-05 14:32:53,402 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1590 transitions. Word has length 19 [2021-06-05 14:32:53,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:53,402 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1590 transitions. [2021-06-05 14:32:53,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1590 transitions. [2021-06-05 14:32:53,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:53,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:53,403 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:53,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-06-05 14:32:53,603 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:53,603 INFO L82 PathProgramCache]: Analyzing trace with hash 780343278, now seen corresponding path program 65 times [2021-06-05 14:32:53,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:53,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681279700] [2021-06-05 14:32:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:53,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:53,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681279700] [2021-06-05 14:32:53,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681279700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:53,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114648978] [2021-06-05 14:32:53,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:53,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:53,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:53,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:53,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:53,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:53,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:53,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:53,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:53,938 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:53,942 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:53,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:53,948 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:53,951 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:53,954 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:53,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:53,957 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:54,014 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:32:54,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:54,015 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:32:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:54,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114648978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:54,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:54,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:54,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907885095] [2021-06-05 14:32:54,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:54,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:54,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:54,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:54,109 INFO L87 Difference]: Start difference. First operand 505 states and 1590 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:54,758 INFO L93 Difference]: Finished difference Result 799 states and 2337 transitions. [2021-06-05 14:32:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:32:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:54,759 INFO L225 Difference]: With dead ends: 799 [2021-06-05 14:32:54,759 INFO L226 Difference]: Without dead ends: 755 [2021-06-05 14:32:54,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 692.0ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:32:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-05 14:32:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 505. [2021-06-05 14:32:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1547619047619047) internal successors, (1590), 504 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1590 transitions. [2021-06-05 14:32:54,765 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1590 transitions. Word has length 19 [2021-06-05 14:32:54,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:54,766 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1590 transitions. [2021-06-05 14:32:54,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1590 transitions. [2021-06-05 14:32:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:54,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:54,766 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:54,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-05 14:32:54,967 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1365827482, now seen corresponding path program 66 times [2021-06-05 14:32:54,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:54,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162992271] [2021-06-05 14:32:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:55,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:55,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162992271] [2021-06-05 14:32:55,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162992271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:55,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878879634] [2021-06-05 14:32:55,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:55,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:32:55,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:55,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:55,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:55,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:55,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:55,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:55,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:55,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:55,311 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:55,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:55,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:55,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:55,324 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:55,327 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:55,329 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:55,380 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:32:55,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:55,381 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:32:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:55,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878879634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:55,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:55,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:32:55,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478351319] [2021-06-05 14:32:55,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:32:55,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:55,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:32:55,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:32:55,487 INFO L87 Difference]: Start difference. First operand 505 states and 1590 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:56,047 INFO L93 Difference]: Finished difference Result 700 states and 2119 transitions. [2021-06-05 14:32:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:56,048 INFO L225 Difference]: With dead ends: 700 [2021-06-05 14:32:56,048 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 14:32:56,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:32:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 14:32:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 508. [2021-06-05 14:32:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.157790927021696) internal successors, (1601), 507 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1601 transitions. [2021-06-05 14:32:56,054 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1601 transitions. Word has length 19 [2021-06-05 14:32:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:56,054 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1601 transitions. [2021-06-05 14:32:56,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1601 transitions. [2021-06-05 14:32:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:56,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:56,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:56,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:56,269 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash -255608602, now seen corresponding path program 67 times [2021-06-05 14:32:56,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:56,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148965874] [2021-06-05 14:32:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:56,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:56,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148965874] [2021-06-05 14:32:56,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148965874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:56,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830136822] [2021-06-05 14:32:56,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:32:56,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:56,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:56,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:56,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:56,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:56,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:32:56,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:32:56,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 14:32:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:56,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830136822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:56,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:56,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:56,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058924375] [2021-06-05 14:32:56,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:56,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:56,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:56,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:56,744 INFO L87 Difference]: Start difference. First operand 508 states and 1601 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:57,178 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 14:32:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:57,448 INFO L93 Difference]: Finished difference Result 827 states and 2411 transitions. [2021-06-05 14:32:57,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:32:57,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:57,449 INFO L225 Difference]: With dead ends: 827 [2021-06-05 14:32:57,449 INFO L226 Difference]: Without dead ends: 798 [2021-06-05 14:32:57,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 777.6ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:32:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-06-05 14:32:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 509. [2021-06-05 14:32:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.1633858267716537) internal successors, (1607), 508 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:57,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1607 transitions. [2021-06-05 14:32:57,456 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1607 transitions. Word has length 19 [2021-06-05 14:32:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:57,456 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1607 transitions. [2021-06-05 14:32:57,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1607 transitions. [2021-06-05 14:32:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:57,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:57,457 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:57,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1288 [2021-06-05 14:32:57,673 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:57,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:57,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1696046920, now seen corresponding path program 68 times [2021-06-05 14:32:57,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:57,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989943290] [2021-06-05 14:32:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:57,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:57,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989943290] [2021-06-05 14:32:57,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989943290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:57,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706464501] [2021-06-05 14:32:57,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:57,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:32:57,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:57,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:58,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:58,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:32:58,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:58,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:32:58,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:58,047 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:58,050 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:32:58,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:32:58,056 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:58,107 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:32:58,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:32:58,107 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-06-05 14:32:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:58,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706464501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:58,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:58,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:58,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029763262] [2021-06-05 14:32:58,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:58,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:58,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:58,212 INFO L87 Difference]: Start difference. First operand 509 states and 1607 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:32:59,136 INFO L93 Difference]: Finished difference Result 891 states and 2568 transitions. [2021-06-05 14:32:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:32:59,137 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:32:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:32:59,138 INFO L225 Difference]: With dead ends: 891 [2021-06-05 14:32:59,138 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 14:32:59,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 937.8ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:32:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 14:32:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 511. [2021-06-05 14:32:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.168627450980392) internal successors, (1616), 510 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1616 transitions. [2021-06-05 14:32:59,144 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1616 transitions. Word has length 19 [2021-06-05 14:32:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:32:59,144 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1616 transitions. [2021-06-05 14:32:59,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:32:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1616 transitions. [2021-06-05 14:32:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:32:59,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:32:59,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:32:59,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1300 [2021-06-05 14:32:59,346 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:32:59,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:32:59,346 INFO L82 PathProgramCache]: Analyzing trace with hash 927157478, now seen corresponding path program 69 times [2021-06-05 14:32:59,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:32:59,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356185456] [2021-06-05 14:32:59,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:32:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:32:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:59,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:32:59,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356185456] [2021-06-05 14:32:59,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356185456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:59,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523849779] [2021-06-05 14:32:59,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:32:59,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:32:59,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:32:59,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:32:59,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:32:59,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:59,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:59,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:59,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:59,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:59,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:59,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:59,764 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:32:59,768 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:32:59,771 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:32:59,774 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:32:59,778 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:32:59,858 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-06-05 14:32:59,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:32:59,859 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-06-05 14:32:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:32:59,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523849779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:32:59,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:32:59,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:32:59,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381322321] [2021-06-05 14:32:59,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:32:59,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:32:59,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:32:59,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:32:59,978 INFO L87 Difference]: Start difference. First operand 511 states and 1616 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:00,643 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 14:33:00,797 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 14:33:01,390 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 14:33:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:01,436 INFO L93 Difference]: Finished difference Result 942 states and 2693 transitions. [2021-06-05 14:33:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:33:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:01,437 INFO L225 Difference]: With dead ends: 942 [2021-06-05 14:33:01,437 INFO L226 Difference]: Without dead ends: 898 [2021-06-05 14:33:01,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1431.1ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:33:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-06-05 14:33:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 509. [2021-06-05 14:33:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.1633858267716537) internal successors, (1607), 508 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1607 transitions. [2021-06-05 14:33:01,445 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1607 transitions. Word has length 19 [2021-06-05 14:33:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:01,445 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1607 transitions. [2021-06-05 14:33:01,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1607 transitions. [2021-06-05 14:33:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:01,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:01,446 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:01,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1319 [2021-06-05 14:33:01,661 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1788432346, now seen corresponding path program 70 times [2021-06-05 14:33:01,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:01,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814998019] [2021-06-05 14:33:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:01,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:01,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814998019] [2021-06-05 14:33:01,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814998019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:01,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316701609] [2021-06-05 14:33:01,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:01,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:01,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:01,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:01,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:02,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:02,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:02,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:02,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:02,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:02,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:02,061 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:02,065 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:02,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:02,073 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:02,077 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:02,081 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:02,085 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:02,089 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:02,093 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:02,293 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 14:33:02,294 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.7 percent of original size [2021-06-05 14:33:02,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:33:02,296 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-06-05 14:33:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:02,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316701609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:02,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:02,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:02,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047932336] [2021-06-05 14:33:02,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:02,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:02,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:02,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:02,543 INFO L87 Difference]: Start difference. First operand 509 states and 1607 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:02,954 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-05 14:33:03,685 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 14:33:03,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:03,703 INFO L93 Difference]: Finished difference Result 993 states and 2820 transitions. [2021-06-05 14:33:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:33:03,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:03,705 INFO L225 Difference]: With dead ends: 993 [2021-06-05 14:33:03,705 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 14:33:03,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1300.7ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:33:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 14:33:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 515. [2021-06-05 14:33:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.184824902723735) internal successors, (1637), 514 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1637 transitions. [2021-06-05 14:33:03,712 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1637 transitions. Word has length 19 [2021-06-05 14:33:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:03,712 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1637 transitions. [2021-06-05 14:33:03,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1637 transitions. [2021-06-05 14:33:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:03,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:03,713 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:03,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-06-05 14:33:03,913 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:03,913 INFO L82 PathProgramCache]: Analyzing trace with hash -496089946, now seen corresponding path program 71 times [2021-06-05 14:33:03,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:03,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110737370] [2021-06-05 14:33:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:04,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:04,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110737370] [2021-06-05 14:33:04,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110737370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:04,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308828324] [2021-06-05 14:33:04,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:04,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:04,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:04,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:04,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:04,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:04,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:04,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:04,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:04,295 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:04,299 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:04,303 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:04,306 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:04,310 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:04,314 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:04,317 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:04,321 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:04,325 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:04,329 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:04,332 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:04,485 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 14:33:04,485 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 14:33:04,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:33:04,487 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 14:33:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:04,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308828324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:04,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:04,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:04,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675527106] [2021-06-05 14:33:04,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:04,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:04,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:04,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:04,745 INFO L87 Difference]: Start difference. First operand 515 states and 1637 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:05,215 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 14:33:05,434 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-05 14:33:05,657 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-05 14:33:05,844 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-05 14:33:06,008 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-05 14:33:06,369 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 14:33:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:06,680 INFO L93 Difference]: Finished difference Result 981 states and 2784 transitions. [2021-06-05 14:33:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:33:06,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:06,682 INFO L225 Difference]: With dead ends: 981 [2021-06-05 14:33:06,682 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 14:33:06,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1966.0ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:33:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 14:33:06,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 515. [2021-06-05 14:33:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.184824902723735) internal successors, (1637), 514 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1637 transitions. [2021-06-05 14:33:06,692 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1637 transitions. Word has length 19 [2021-06-05 14:33:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:06,692 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1637 transitions. [2021-06-05 14:33:06,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1637 transitions. [2021-06-05 14:33:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:06,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:06,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:06,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1356,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:06,901 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:06,901 INFO L82 PathProgramCache]: Analyzing trace with hash 65191608, now seen corresponding path program 72 times [2021-06-05 14:33:06,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:06,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620239884] [2021-06-05 14:33:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:07,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:07,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620239884] [2021-06-05 14:33:07,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620239884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:07,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177234790] [2021-06-05 14:33:07,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:07,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:07,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:07,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:07,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:07,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:07,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:07,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:07,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:07,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:07,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:07,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:07,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:07,352 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:07,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:07,358 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:07,416 INFO L628 ElimStorePlain]: treesize reduction 77, result has 44.2 percent of original size [2021-06-05 14:33:07,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:07,417 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:397, output treesize:61 [2021-06-05 14:33:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:07,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177234790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:07,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:07,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:33:07,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348653911] [2021-06-05 14:33:07,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:33:07,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:07,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:33:07,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:07,514 INFO L87 Difference]: Start difference. First operand 515 states and 1637 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:07,892 INFO L93 Difference]: Finished difference Result 732 states and 2210 transitions. [2021-06-05 14:33:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:07,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:07,893 INFO L225 Difference]: With dead ends: 732 [2021-06-05 14:33:07,894 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 14:33:07,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 565.3ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 14:33:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 519. [2021-06-05 14:33:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.193050193050193) internal successors, (1654), 518 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1654 transitions. [2021-06-05 14:33:07,899 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1654 transitions. Word has length 19 [2021-06-05 14:33:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:07,899 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1654 transitions. [2021-06-05 14:33:07,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1654 transitions. [2021-06-05 14:33:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:07,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:07,900 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:08,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1379 [2021-06-05 14:33:08,101 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1428716114, now seen corresponding path program 73 times [2021-06-05 14:33:08,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:08,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785854476] [2021-06-05 14:33:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:08,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:08,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785854476] [2021-06-05 14:33:08,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785854476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:08,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058960095] [2021-06-05 14:33:08,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:08,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:08,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:08,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:08,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:08,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:08,570 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:33:08,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:08,571 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:33:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:08,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058960095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:08,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:08,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:33:08,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264258490] [2021-06-05 14:33:08,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:33:08,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:08,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:33:08,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:08,624 INFO L87 Difference]: Start difference. First operand 519 states and 1654 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:09,083 INFO L93 Difference]: Finished difference Result 721 states and 2190 transitions. [2021-06-05 14:33:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:33:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:09,085 INFO L225 Difference]: With dead ends: 721 [2021-06-05 14:33:09,085 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 14:33:09,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:33:09,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 14:33:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 518. [2021-06-05 14:33:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 3.195357833655706) internal successors, (1652), 517 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1652 transitions. [2021-06-05 14:33:09,090 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1652 transitions. Word has length 19 [2021-06-05 14:33:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:09,090 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1652 transitions. [2021-06-05 14:33:09,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1652 transitions. [2021-06-05 14:33:09,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:09,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:09,091 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:09,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-06-05 14:33:09,291 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:09,292 INFO L82 PathProgramCache]: Analyzing trace with hash 816592046, now seen corresponding path program 74 times [2021-06-05 14:33:09,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:09,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173392481] [2021-06-05 14:33:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:09,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:09,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173392481] [2021-06-05 14:33:09,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173392481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:09,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011868894] [2021-06-05 14:33:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:09,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:09,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:09,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:09,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:09,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:09,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:09,659 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:09,663 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:09,667 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:09,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:09,675 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:09,678 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:09,682 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:09,686 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:09,690 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:09,694 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:09,697 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:09,701 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:09,855 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 14:33:09,855 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 14:33:09,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:33:09,857 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 14:33:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:10,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011868894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:10,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:10,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:10,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992943026] [2021-06-05 14:33:10,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:10,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:10,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:10,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:10,056 INFO L87 Difference]: Start difference. First operand 518 states and 1652 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:10,912 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-05 14:33:11,462 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 14:33:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:11,472 INFO L93 Difference]: Finished difference Result 919 states and 2686 transitions. [2021-06-05 14:33:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:33:11,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:11,474 INFO L225 Difference]: With dead ends: 919 [2021-06-05 14:33:11,474 INFO L226 Difference]: Without dead ends: 904 [2021-06-05 14:33:11,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1469.0ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:33:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-05 14:33:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 523. [2021-06-05 14:33:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 3.210727969348659) internal successors, (1676), 522 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1676 transitions. [2021-06-05 14:33:11,481 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1676 transitions. Word has length 19 [2021-06-05 14:33:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:11,481 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1676 transitions. [2021-06-05 14:33:11,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1676 transitions. [2021-06-05 14:33:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:11,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:11,481 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:11,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-06-05 14:33:11,685 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2108934446, now seen corresponding path program 75 times [2021-06-05 14:33:11,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:11,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116511797] [2021-06-05 14:33:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:11,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:11,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116511797] [2021-06-05 14:33:11,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116511797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:11,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431818067] [2021-06-05 14:33:11,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:11,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:33:11,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:11,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:12,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:12,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:12,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:12,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:12,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:12,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:12,061 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:12,066 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:12,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:12,075 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:12,078 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:12,082 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:12,086 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:12,090 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:12,093 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:12,097 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:12,100 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:12,254 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 14:33:12,254 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 14:33:12,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:33:12,256 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 14:33:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:12,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431818067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:12,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:12,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:12,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702112103] [2021-06-05 14:33:12,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:12,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:12,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:12,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:12,492 INFO L87 Difference]: Start difference. First operand 523 states and 1676 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,309 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-05 14:33:13,542 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-06-05 14:33:13,682 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 14:33:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:13,833 INFO L93 Difference]: Finished difference Result 897 states and 2621 transitions. [2021-06-05 14:33:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:33:13,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:13,834 INFO L225 Difference]: With dead ends: 897 [2021-06-05 14:33:13,834 INFO L226 Difference]: Without dead ends: 882 [2021-06-05 14:33:13,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1461.1ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:33:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-05 14:33:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 516. [2021-06-05 14:33:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.1902912621359225) internal successors, (1643), 515 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1643 transitions. [2021-06-05 14:33:13,841 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1643 transitions. Word has length 19 [2021-06-05 14:33:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:13,841 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1643 transitions. [2021-06-05 14:33:13,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1643 transitions. [2021-06-05 14:33:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:13,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:13,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:14,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-06-05 14:33:14,042 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:14,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1568513078, now seen corresponding path program 76 times [2021-06-05 14:33:14,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:14,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863502306] [2021-06-05 14:33:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:14,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:14,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863502306] [2021-06-05 14:33:14,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863502306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:14,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839899317] [2021-06-05 14:33:14,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:14,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:14,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:14,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:14,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:14,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:14,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:14,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:14,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:14,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:14,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:14,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:14,456 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:114, output treesize:35 [2021-06-05 14:33:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:14,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839899317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:14,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:14,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:33:14,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852622657] [2021-06-05 14:33:14,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:33:14,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:14,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:33:14,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:33:14,505 INFO L87 Difference]: Start difference. First operand 516 states and 1643 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:14,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:14,882 INFO L93 Difference]: Finished difference Result 913 states and 2714 transitions. [2021-06-05 14:33:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:14,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:14,883 INFO L225 Difference]: With dead ends: 913 [2021-06-05 14:33:14,883 INFO L226 Difference]: Without dead ends: 873 [2021-06-05 14:33:14,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 536.6ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:33:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-06-05 14:33:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 525. [2021-06-05 14:33:14,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.1946564885496183) internal successors, (1674), 524 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1674 transitions. [2021-06-05 14:33:14,890 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1674 transitions. Word has length 19 [2021-06-05 14:33:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:14,890 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1674 transitions. [2021-06-05 14:33:14,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1674 transitions. [2021-06-05 14:33:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:14,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:14,890 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:15,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1453 [2021-06-05 14:33:15,091 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:15,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2032632552, now seen corresponding path program 77 times [2021-06-05 14:33:15,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:15,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755311922] [2021-06-05 14:33:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:15,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:15,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755311922] [2021-06-05 14:33:15,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755311922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:15,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571621143] [2021-06-05 14:33:15,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:15,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:15,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:15,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:15,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:15,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:15,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:15,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:15,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:15,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:15,549 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:33 [2021-06-05 14:33:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:15,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571621143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:15,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:15,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:15,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139808719] [2021-06-05 14:33:15,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:15,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:15,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:15,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:15,597 INFO L87 Difference]: Start difference. First operand 525 states and 1674 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:16,008 INFO L93 Difference]: Finished difference Result 881 states and 2649 transitions. [2021-06-05 14:33:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:16,009 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:16,010 INFO L225 Difference]: With dead ends: 881 [2021-06-05 14:33:16,010 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 14:33:16,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 604.6ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:33:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 14:33:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 525. [2021-06-05 14:33:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.1946564885496183) internal successors, (1674), 524 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1674 transitions. [2021-06-05 14:33:16,016 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1674 transitions. Word has length 19 [2021-06-05 14:33:16,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:16,017 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1674 transitions. [2021-06-05 14:33:16,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:16,017 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1674 transitions. [2021-06-05 14:33:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:16,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:16,017 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:16,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-05 14:33:16,218 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash 592194234, now seen corresponding path program 78 times [2021-06-05 14:33:16,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:16,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348900766] [2021-06-05 14:33:16,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:16,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:16,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348900766] [2021-06-05 14:33:16,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348900766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:16,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011599596] [2021-06-05 14:33:16,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:16,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:16,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:16,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:16,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:16,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:16,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:16,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:16,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:16,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:16,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:16,678 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:16,682 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:16,685 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:16,689 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:16,692 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:16,696 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:16,699 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:16,764 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 14:33:16,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:16,765 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 14:33:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:16,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011599596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:16,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:16,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:16,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342351801] [2021-06-05 14:33:16,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:16,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:16,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:16,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:16,873 INFO L87 Difference]: Start difference. First operand 525 states and 1674 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,336 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-05 14:33:17,517 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-06-05 14:33:17,883 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 14:33:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:17,914 INFO L93 Difference]: Finished difference Result 945 states and 2800 transitions. [2021-06-05 14:33:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:17,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:17,916 INFO L225 Difference]: With dead ends: 945 [2021-06-05 14:33:17,916 INFO L226 Difference]: Without dead ends: 895 [2021-06-05 14:33:17,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1160.8ms TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:33:17,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-06-05 14:33:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 533. [2021-06-05 14:33:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 3.191729323308271) internal successors, (1698), 532 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1698 transitions. [2021-06-05 14:33:17,922 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1698 transitions. Word has length 19 [2021-06-05 14:33:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:17,922 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1698 transitions. [2021-06-05 14:33:17,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1698 transitions. [2021-06-05 14:33:17,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:17,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:17,923 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:18,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1472,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:18,124 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:18,124 INFO L82 PathProgramCache]: Analyzing trace with hash 653498678, now seen corresponding path program 79 times [2021-06-05 14:33:18,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:18,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666819300] [2021-06-05 14:33:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:18,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:18,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666819300] [2021-06-05 14:33:18,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666819300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:18,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929955791] [2021-06-05 14:33:18,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:18,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:18,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:18,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:18,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:18,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:18,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:18,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:18,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:18,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:77, output treesize:35 [2021-06-05 14:33:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:18,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929955791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:18,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:18,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:18,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743625802] [2021-06-05 14:33:18,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:18,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:18,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:18,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:18,662 INFO L87 Difference]: Start difference. First operand 533 states and 1698 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:19,253 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 14:33:19,386 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 14:33:19,702 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-06-05 14:33:19,926 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-06-05 14:33:20,177 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 14:33:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:20,197 INFO L93 Difference]: Finished difference Result 964 states and 2848 transitions. [2021-06-05 14:33:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:20,198 INFO L225 Difference]: With dead ends: 964 [2021-06-05 14:33:20,198 INFO L226 Difference]: Without dead ends: 935 [2021-06-05 14:33:20,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1592.5ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:33:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-06-05 14:33:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 537. [2021-06-05 14:33:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-06-05 14:33:20,205 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 19 [2021-06-05 14:33:20,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:20,205 INFO L482 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-06-05 14:33:20,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-06-05 14:33:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:20,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:20,206 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:20,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1488,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:20,406 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash -113347470, now seen corresponding path program 80 times [2021-06-05 14:33:20,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:20,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435126442] [2021-06-05 14:33:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:20,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:20,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435126442] [2021-06-05 14:33:20,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435126442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:20,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949304837] [2021-06-05 14:33:20,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:20,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:20,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:20,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:20,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:20,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:20,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:20,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:20,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:20,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:20,827 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:20,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:20,832 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:20,914 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-05 14:33:20,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:33:20,916 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-06-05 14:33:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:21,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949304837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:21,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:21,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:33:21,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294536145] [2021-06-05 14:33:21,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:33:21,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:21,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:33:21,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:33:21,023 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:21,751 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-05 14:33:22,196 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 14:33:22,580 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 14:33:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:22,822 INFO L93 Difference]: Finished difference Result 1149 states and 3281 transitions. [2021-06-05 14:33:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:33:22,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:22,824 INFO L225 Difference]: With dead ends: 1149 [2021-06-05 14:33:22,824 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 14:33:22,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1878.2ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:33:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 14:33:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 590. [2021-06-05 14:33:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.191850594227504) internal successors, (1880), 589 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1880 transitions. [2021-06-05 14:33:22,831 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1880 transitions. Word has length 19 [2021-06-05 14:33:22,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:22,831 INFO L482 AbstractCegarLoop]: Abstraction has 590 states and 1880 transitions. [2021-06-05 14:33:22,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:22,831 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1880 transitions. [2021-06-05 14:33:22,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:22,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:22,832 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:23,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1500 [2021-06-05 14:33:23,032 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:23,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:23,033 INFO L82 PathProgramCache]: Analyzing trace with hash -637536650, now seen corresponding path program 81 times [2021-06-05 14:33:23,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:23,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816351341] [2021-06-05 14:33:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:23,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:23,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816351341] [2021-06-05 14:33:23,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816351341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:23,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363345095] [2021-06-05 14:33:23,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:23,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:23,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:23,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:23,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:23,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:23,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:23,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:23,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:23,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:23,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:23,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 14:33:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:23,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363345095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:23,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:23,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:23,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450876510] [2021-06-05 14:33:23,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:23,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:23,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:23,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:23,617 INFO L87 Difference]: Start difference. First operand 590 states and 1880 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:24,348 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 14:33:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:24,369 INFO L93 Difference]: Finished difference Result 963 states and 2889 transitions. [2021-06-05 14:33:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:24,370 INFO L225 Difference]: With dead ends: 963 [2021-06-05 14:33:24,370 INFO L226 Difference]: Without dead ends: 934 [2021-06-05 14:33:24,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 941.9ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-06-05 14:33:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 591. [2021-06-05 14:33:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1966101694915254) internal successors, (1886), 590 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1886 transitions. [2021-06-05 14:33:24,377 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1886 transitions. Word has length 19 [2021-06-05 14:33:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:24,377 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1886 transitions. [2021-06-05 14:33:24,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:24,377 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1886 transitions. [2021-06-05 14:33:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:24,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:24,378 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:24,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1516,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:24,578 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:24,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2077974968, now seen corresponding path program 82 times [2021-06-05 14:33:24,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:24,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105110403] [2021-06-05 14:33:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:24,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:24,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105110403] [2021-06-05 14:33:24,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105110403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:24,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994776884] [2021-06-05 14:33:24,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:24,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:24,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:24,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:24,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:24,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:24,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:24,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:25,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:25,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:25,009 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:25,013 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:25,016 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:25,020 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:25,023 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:25,026 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:25,030 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:25,033 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:25,101 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-05 14:33:25,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:25,102 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 14:33:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:25,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994776884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:25,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:25,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:25,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233381327] [2021-06-05 14:33:25,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:25,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:25,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:25,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:25,210 INFO L87 Difference]: Start difference. First operand 591 states and 1886 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:25,881 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 14:33:26,122 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-05 14:33:26,269 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-05 14:33:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:26,304 INFO L93 Difference]: Finished difference Result 1034 states and 3055 transitions. [2021-06-05 14:33:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:26,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:26,305 INFO L225 Difference]: With dead ends: 1034 [2021-06-05 14:33:26,305 INFO L226 Difference]: Without dead ends: 984 [2021-06-05 14:33:26,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1214.7ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:33:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-06-05 14:33:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 593. [2021-06-05 14:33:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.2010135135135136) internal successors, (1895), 592 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1895 transitions. [2021-06-05 14:33:26,313 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1895 transitions. Word has length 19 [2021-06-05 14:33:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:26,313 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1895 transitions. [2021-06-05 14:33:26,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1895 transitions. [2021-06-05 14:33:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:26,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:26,314 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:26,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1524 [2021-06-05 14:33:26,514 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:26,514 INFO L82 PathProgramCache]: Analyzing trace with hash 545229430, now seen corresponding path program 83 times [2021-06-05 14:33:26,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:26,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965830444] [2021-06-05 14:33:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:26,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965830444] [2021-06-05 14:33:26,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965830444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313262961] [2021-06-05 14:33:26,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:26,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:26,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:26,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:26,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:27,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:27,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:27,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:27,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:27,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:27,081 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:27,083 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:27,129 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-05 14:33:27,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:27,130 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-05 14:33:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:27,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313262961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:27,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:27,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:27,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489763973] [2021-06-05 14:33:27,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:27,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:27,223 INFO L87 Difference]: Start difference. First operand 593 states and 1895 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:27,511 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-06-05 14:33:27,781 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-05 14:33:27,940 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-06-05 14:33:28,123 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 14:33:28,342 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-06-05 14:33:28,606 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-06-05 14:33:28,756 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 14:33:28,972 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-05 14:33:29,186 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 14:33:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:29,218 INFO L93 Difference]: Finished difference Result 1015 states and 3000 transitions. [2021-06-05 14:33:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:33:29,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:29,220 INFO L225 Difference]: With dead ends: 1015 [2021-06-05 14:33:29,220 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 14:33:29,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2144.3ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:33:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 14:33:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 591. [2021-06-05 14:33:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1966101694915254) internal successors, (1886), 590 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1886 transitions. [2021-06-05 14:33:29,227 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1886 transitions. Word has length 19 [2021-06-05 14:33:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:29,227 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1886 transitions. [2021-06-05 14:33:29,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1886 transitions. [2021-06-05 14:33:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:29,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:29,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:29,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1540 [2021-06-05 14:33:29,429 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:29,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2124606902, now seen corresponding path program 84 times [2021-06-05 14:33:29,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:29,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637879575] [2021-06-05 14:33:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:29,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:29,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637879575] [2021-06-05 14:33:29,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637879575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:29,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657591347] [2021-06-05 14:33:29,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:29,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:33:29,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:29,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:29,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:29,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:29,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:29,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:29,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:29,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:29,841 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:29,845 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:29,850 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:29,854 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:29,858 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:29,862 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:29,866 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:29,869 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:29,873 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:29,877 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:29,881 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:29,885 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:29,889 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:29,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:29,892 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:30,096 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 14:33:30,096 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-06-05 14:33:30,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:33:30,099 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-05 14:33:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:30,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657591347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:30,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:30,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:30,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781323228] [2021-06-05 14:33:30,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:30,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:30,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:30,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:30,338 INFO L87 Difference]: Start difference. First operand 591 states and 1886 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:30,942 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 14:33:31,152 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-06-05 14:33:31,532 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-05 14:33:31,715 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 14:33:31,851 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2021-06-05 14:33:32,091 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 14:33:32,408 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-06-05 14:33:32,582 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-06-05 14:33:33,034 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-06-05 14:33:33,278 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-05 14:33:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:33,279 INFO L93 Difference]: Finished difference Result 1188 states and 3415 transitions. [2021-06-05 14:33:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:33:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:33,280 INFO L225 Difference]: With dead ends: 1188 [2021-06-05 14:33:33,280 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 14:33:33,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3063.4ms TimeCoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:33:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 14:33:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 599. [2021-06-05 14:33:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2157190635451505) internal successors, (1923), 598 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1923 transitions. [2021-06-05 14:33:33,289 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1923 transitions. Word has length 19 [2021-06-05 14:33:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:33,289 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1923 transitions. [2021-06-05 14:33:33,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:33,289 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1923 transitions. [2021-06-05 14:33:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:33,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:33,290 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:33,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1556 [2021-06-05 14:33:33,490 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:33,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:33,490 INFO L82 PathProgramCache]: Analyzing trace with hash -878017994, now seen corresponding path program 85 times [2021-06-05 14:33:33,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:33,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276116249] [2021-06-05 14:33:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:33,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:33,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276116249] [2021-06-05 14:33:33,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276116249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:33,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144120678] [2021-06-05 14:33:33,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:33,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:33,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:33,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:33,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:33,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:33,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:33,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:33,887 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:33,892 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:33,896 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:33,901 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:33,905 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:33,909 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:33,914 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:33,918 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:33,922 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:33,926 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:33,930 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:33,934 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:33,938 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:33,942 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:33,946 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:33,950 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:33,954 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:33,958 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:33,961 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:34,173 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 14:33:34,173 INFO L628 ElimStorePlain]: treesize reduction 101, result has 68.7 percent of original size [2021-06-05 14:33:34,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:33:34,176 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-06-05 14:33:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:34,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144120678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:34,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:34,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:34,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149976157] [2021-06-05 14:33:34,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:34,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:34,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:34,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:34,492 INFO L87 Difference]: Start difference. First operand 599 states and 1923 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:35,409 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 14:33:35,686 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 14:33:35,990 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 14:33:36,308 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-06-05 14:33:36,490 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 14:33:36,702 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 14:33:37,025 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 14:33:37,175 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-06-05 14:33:37,334 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 14:33:37,795 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-06-05 14:33:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:37,914 INFO L93 Difference]: Finished difference Result 1095 states and 3202 transitions. [2021-06-05 14:33:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:33:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:37,916 INFO L225 Difference]: With dead ends: 1095 [2021-06-05 14:33:37,916 INFO L226 Difference]: Without dead ends: 1025 [2021-06-05 14:33:37,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3437.1ms TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:33:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-05 14:33:37,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 596. [2021-06-05 14:33:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.196638655462185) internal successors, (1902), 595 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1902 transitions. [2021-06-05 14:33:37,924 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1902 transitions. Word has length 19 [2021-06-05 14:33:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:37,924 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1902 transitions. [2021-06-05 14:33:37,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1902 transitions. [2021-06-05 14:33:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:37,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:37,924 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:38,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1577 [2021-06-05 14:33:38,125 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:38,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:38,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1960185702, now seen corresponding path program 86 times [2021-06-05 14:33:38,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:38,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974080044] [2021-06-05 14:33:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:38,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:38,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974080044] [2021-06-05 14:33:38,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974080044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:38,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876454196] [2021-06-05 14:33:38,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:38,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:38,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:38,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:38,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:38,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:38,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:38,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:38,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:33:38,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:33:38,599 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 14:33:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:38,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876454196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:38,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:38,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:38,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056760195] [2021-06-05 14:33:38,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:38,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:38,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:38,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:38,651 INFO L87 Difference]: Start difference. First operand 596 states and 1902 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:39,015 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 14:33:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:39,377 INFO L93 Difference]: Finished difference Result 952 states and 2884 transitions. [2021-06-05 14:33:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:33:39,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:39,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:39,379 INFO L225 Difference]: With dead ends: 952 [2021-06-05 14:33:39,379 INFO L226 Difference]: Without dead ends: 923 [2021-06-05 14:33:39,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 898.1ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:33:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-05 14:33:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 598. [2021-06-05 14:33:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.204355108877722) internal successors, (1913), 597 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1913 transitions. [2021-06-05 14:33:39,386 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1913 transitions. Word has length 19 [2021-06-05 14:33:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:39,386 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1913 transitions. [2021-06-05 14:33:39,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1913 transitions. [2021-06-05 14:33:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:39,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:39,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:39,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-06-05 14:33:39,587 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:39,587 INFO L82 PathProgramCache]: Analyzing trace with hash 519747384, now seen corresponding path program 87 times [2021-06-05 14:33:39,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:39,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551732545] [2021-06-05 14:33:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:39,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:39,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551732545] [2021-06-05 14:33:39,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551732545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:39,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274060147] [2021-06-05 14:33:39,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:39,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:39,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:39,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:39,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:40,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:40,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:40,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:40,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:40,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:40,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:40,090 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:40,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:40,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:40,101 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:40,104 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:40,107 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:40,111 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:40,179 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-05 14:33:40,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:33:40,180 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 14:33:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:40,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274060147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:40,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:40,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:40,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986366442] [2021-06-05 14:33:40,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:40,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:40,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:40,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:40,287 INFO L87 Difference]: Start difference. First operand 598 states and 1913 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:40,947 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-06-05 14:33:41,180 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 14:33:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:41,216 INFO L93 Difference]: Finished difference Result 1023 states and 3050 transitions. [2021-06-05 14:33:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:33:41,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:41,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:41,218 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 14:33:41,218 INFO L226 Difference]: Without dead ends: 973 [2021-06-05 14:33:41,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1143.3ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:33:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-06-05 14:33:41,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 602. [2021-06-05 14:33:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.2096505823627286) internal successors, (1929), 601 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1929 transitions. [2021-06-05 14:33:41,229 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1929 transitions. Word has length 19 [2021-06-05 14:33:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:41,229 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1929 transitions. [2021-06-05 14:33:41,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1929 transitions. [2021-06-05 14:33:41,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:41,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:41,230 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:41,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1606,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:41,452 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:41,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1152015514, now seen corresponding path program 88 times [2021-06-05 14:33:41,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:41,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421199343] [2021-06-05 14:33:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:41,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:41,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421199343] [2021-06-05 14:33:41,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421199343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:41,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531499783] [2021-06-05 14:33:41,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:41,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:33:41,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:41,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:41,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:41,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:41,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:41,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:41,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:41,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:41,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:41,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:41,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:41,959 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-05 14:33:41,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:33:41,961 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-06-05 14:33:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:42,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531499783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:42,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:42,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:42,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967176819] [2021-06-05 14:33:42,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:42,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:42,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:42,070 INFO L87 Difference]: Start difference. First operand 602 states and 1929 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:42,517 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-05 14:33:42,743 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 14:33:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:43,226 INFO L93 Difference]: Finished difference Result 1114 states and 3328 transitions. [2021-06-05 14:33:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:33:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:43,227 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 14:33:43,227 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 14:33:43,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1225.3ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:33:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 14:33:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 607. [2021-06-05 14:33:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 3.222772277227723) internal successors, (1953), 606 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1953 transitions. [2021-06-05 14:33:43,235 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1953 transitions. Word has length 19 [2021-06-05 14:33:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:43,235 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1953 transitions. [2021-06-05 14:33:43,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1953 transitions. [2021-06-05 14:33:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:43,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:43,236 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:43,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1622 [2021-06-05 14:33:43,436 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1719704358, now seen corresponding path program 89 times [2021-06-05 14:33:43,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:43,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966550205] [2021-06-05 14:33:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:43,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:43,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966550205] [2021-06-05 14:33:43,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966550205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:43,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780423513] [2021-06-05 14:33:43,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:43,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:43,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:43,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:43,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:43,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:43,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:43,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:43,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:43,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:43,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:43,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:43,862 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:43,866 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:43,870 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:43,875 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:43,880 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:43,884 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:43,888 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:43,893 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:43,897 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:43,901 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:43,905 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:43,909 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:43,913 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:43,917 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:43,921 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:43,925 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:43,929 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:43,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:43,933 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:44,107 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:33:44,107 INFO L628 ElimStorePlain]: treesize reduction 208, result has 46.8 percent of original size [2021-06-05 14:33:44,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:33:44,109 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:991, output treesize:183 [2021-06-05 14:33:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:44,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780423513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:44,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:44,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:44,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032533918] [2021-06-05 14:33:44,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:44,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:44,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:44,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:44,346 INFO L87 Difference]: Start difference. First operand 607 states and 1953 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:44,888 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 14:33:45,064 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-05 14:33:45,310 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 14:33:45,562 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 14:33:45,741 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-06-05 14:33:45,910 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 14:33:46,097 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 14:33:46,260 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-06-05 14:33:46,399 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 14:33:46,656 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-05 14:33:46,884 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-06-05 14:33:47,178 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 14:33:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:47,197 INFO L93 Difference]: Finished difference Result 1128 states and 3321 transitions. [2021-06-05 14:33:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:33:47,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:47,199 INFO L225 Difference]: With dead ends: 1128 [2021-06-05 14:33:47,199 INFO L226 Difference]: Without dead ends: 1098 [2021-06-05 14:33:47,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2921.7ms TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:33:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-06-05 14:33:47,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 610. [2021-06-05 14:33:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.231527093596059) internal successors, (1968), 609 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1968 transitions. [2021-06-05 14:33:47,212 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1968 transitions. Word has length 19 [2021-06-05 14:33:47,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:47,212 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1968 transitions. [2021-06-05 14:33:47,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1968 transitions. [2021-06-05 14:33:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:47,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:47,213 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:47,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:47,417 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:47,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1344506918, now seen corresponding path program 90 times [2021-06-05 14:33:47,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:47,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676420060] [2021-06-05 14:33:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:47,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:47,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676420060] [2021-06-05 14:33:47,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676420060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:47,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23118920] [2021-06-05 14:33:47,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:47,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:33:47,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:47,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:33:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:47,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:47,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:47,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:47,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:47,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:47,817 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:47,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:47,826 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:47,830 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:47,834 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:47,838 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:47,842 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:47,847 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:47,851 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:47,854 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:47,859 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:47,862 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:47,866 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:33:47,870 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:47,874 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:47,878 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:47,881 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:47,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:47,885 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:48,044 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:33:48,045 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-05 14:33:48,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:33:48,047 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-05 14:33:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:48,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23118920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:48,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:48,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:48,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618332406] [2021-06-05 14:33:48,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:48,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:48,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:48,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:48,339 INFO L87 Difference]: Start difference. First operand 610 states and 1968 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:48,882 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 14:33:49,050 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-05 14:33:49,298 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 14:33:49,556 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 14:33:49,708 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-05 14:33:49,886 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 14:33:50,048 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:33:50,223 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 14:33:50,379 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 14:33:50,532 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 14:33:50,706 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-05 14:33:50,860 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 14:33:51,146 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-06-05 14:33:51,321 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 14:33:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:51,321 INFO L93 Difference]: Finished difference Result 1120 states and 3320 transitions. [2021-06-05 14:33:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:33:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:51,323 INFO L225 Difference]: With dead ends: 1120 [2021-06-05 14:33:51,324 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 14:33:51,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3069.2ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:33:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 14:33:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 608. [2021-06-05 14:33:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.227347611202636) internal successors, (1959), 607 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1959 transitions. [2021-06-05 14:33:51,335 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1959 transitions. Word has length 19 [2021-06-05 14:33:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:51,335 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1959 transitions. [2021-06-05 14:33:51,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:51,335 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1959 transitions. [2021-06-05 14:33:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:51,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:51,336 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:51,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-06-05 14:33:51,536 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:51,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:51,537 INFO L82 PathProgramCache]: Analyzing trace with hash -926613804, now seen corresponding path program 91 times [2021-06-05 14:33:51,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:51,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156210090] [2021-06-05 14:33:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:51,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:51,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156210090] [2021-06-05 14:33:51,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156210090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:51,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456964842] [2021-06-05 14:33:51,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:51,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:51,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:51,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:51,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:51,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:33:51,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:51,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:51,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:51,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:51,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:33:52,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:33:52,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:52,074 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-06-05 14:33:52,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:33:52,075 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:189, output treesize:81 [2021-06-05 14:33:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:52,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456964842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:52,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:52,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:52,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248751255] [2021-06-05 14:33:52,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:52,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:52,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:52,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:52,201 INFO L87 Difference]: Start difference. First operand 608 states and 1959 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:52,898 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2021-06-05 14:33:53,141 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 14:33:53,301 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-06-05 14:33:53,495 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 14:33:53,660 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-05 14:33:53,857 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 14:33:53,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:53,904 INFO L93 Difference]: Finished difference Result 1040 states and 3069 transitions. [2021-06-05 14:33:53,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:33:53,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:53,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:53,905 INFO L225 Difference]: With dead ends: 1040 [2021-06-05 14:33:53,905 INFO L226 Difference]: Without dead ends: 1003 [2021-06-05 14:33:53,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1791.4ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:33:53,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-06-05 14:33:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 608. [2021-06-05 14:33:53,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.224052718286656) internal successors, (1957), 607 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1957 transitions. [2021-06-05 14:33:53,913 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1957 transitions. Word has length 19 [2021-06-05 14:33:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:53,913 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1957 transitions. [2021-06-05 14:33:53,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1957 transitions. [2021-06-05 14:33:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:53,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:53,914 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:54,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1682 [2021-06-05 14:33:54,115 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:54,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1491616842, now seen corresponding path program 92 times [2021-06-05 14:33:54,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:54,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457306305] [2021-06-05 14:33:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:54,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:54,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457306305] [2021-06-05 14:33:54,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457306305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:54,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746639865] [2021-06-05 14:33:54,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:54,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:33:54,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:54,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:54,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:54,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:54,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:54,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:54,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:54,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:54,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:54,541 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:54,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:54,544 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:54,609 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.4 percent of original size [2021-06-05 14:33:54,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:33:54,610 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:158, output treesize:83 [2021-06-05 14:33:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:54,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746639865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:54,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:54,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:54,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340196043] [2021-06-05 14:33:54,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:54,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:54,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:54,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:54,807 INFO L87 Difference]: Start difference. First operand 608 states and 1957 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:55,417 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-06-05 14:33:55,577 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-05 14:33:55,692 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 14:33:55,926 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 14:33:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:33:56,183 INFO L93 Difference]: Finished difference Result 1117 states and 3285 transitions. [2021-06-05 14:33:56,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:33:56,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:33:56,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:33:56,185 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 14:33:56,185 INFO L226 Difference]: Without dead ends: 1038 [2021-06-05 14:33:56,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1542.9ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:33:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-05 14:33:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 615. [2021-06-05 14:33:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 3.239413680781759) internal successors, (1989), 614 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1989 transitions. [2021-06-05 14:33:56,193 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1989 transitions. Word has length 19 [2021-06-05 14:33:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:33:56,193 INFO L482 AbstractCegarLoop]: Abstraction has 615 states and 1989 transitions. [2021-06-05 14:33:56,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1989 transitions. [2021-06-05 14:33:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:33:56,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:33:56,193 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:33:56,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-05 14:33:56,394 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:33:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:33:56,394 INFO L82 PathProgramCache]: Analyzing trace with hash 497471994, now seen corresponding path program 93 times [2021-06-05 14:33:56,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:33:56,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100036210] [2021-06-05 14:33:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:33:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:33:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:56,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:33:56,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100036210] [2021-06-05 14:33:56,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100036210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:56,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696161212] [2021-06-05 14:33:56,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:33:56,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:33:56,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:33:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:33:56,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:33:56,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:56,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:56,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:56,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:56,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:33:56,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:56,925 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:33:56,929 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:33:56,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:56,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:33:56,936 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:33:57,053 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-05 14:33:57,053 INFO L628 ElimStorePlain]: treesize reduction 48, result has 73.5 percent of original size [2021-06-05 14:33:57,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:33:57,054 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:322, output treesize:133 [2021-06-05 14:33:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:33:57,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696161212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:33:57,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:33:57,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:33:57,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423214332] [2021-06-05 14:33:57,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:33:57,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:33:57,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:33:57,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:33:57,366 INFO L87 Difference]: Start difference. First operand 615 states and 1989 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:33:57,849 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 14:33:58,085 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 14:33:58,279 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-06-05 14:33:58,506 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-05 14:33:58,725 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 14:33:58,845 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 14:33:58,975 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-06-05 14:33:59,250 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 14:33:59,406 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 14:33:59,656 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 14:33:59,936 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 14:34:00,181 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 14:34:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:00,182 INFO L93 Difference]: Finished difference Result 1317 states and 3854 transitions. [2021-06-05 14:34:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:34:00,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:00,183 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 14:34:00,183 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 14:34:00,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3112.9ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:34:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 14:34:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 637. [2021-06-05 14:34:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.279874213836478) internal successors, (2086), 636 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2086 transitions. [2021-06-05 14:34:00,193 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2086 transitions. Word has length 19 [2021-06-05 14:34:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:00,193 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2086 transitions. [2021-06-05 14:34:00,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2086 transitions. [2021-06-05 14:34:00,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:00,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:00,193 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:00,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1713,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:00,394 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1789814394, now seen corresponding path program 94 times [2021-06-05 14:34:00,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:00,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230395496] [2021-06-05 14:34:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:00,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:00,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230395496] [2021-06-05 14:34:00,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230395496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:00,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401104765] [2021-06-05 14:34:00,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:00,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:00,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:00,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:34:00,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:00,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:00,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:00,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:00,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:00,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:00,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:00,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:00,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:00,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:00,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:00,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:00,882 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:00,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:00,886 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:00,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:00,889 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:00,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:00,893 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:01,008 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-05 14:34:01,008 INFO L628 ElimStorePlain]: treesize reduction 52, result has 71.9 percent of original size [2021-06-05 14:34:01,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:34:01,010 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:322, output treesize:133 [2021-06-05 14:34:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:01,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401104765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:01,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:01,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:01,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674718726] [2021-06-05 14:34:01,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:01,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:01,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:01,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:01,327 INFO L87 Difference]: Start difference. First operand 637 states and 2086 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:01,791 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-05 14:34:02,027 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 14:34:02,263 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-05 14:34:02,604 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 14:34:02,847 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 14:34:02,985 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:34:03,275 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 14:34:03,538 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-05 14:34:03,702 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-05 14:34:03,967 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 14:34:04,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:04,012 INFO L93 Difference]: Finished difference Result 1320 states and 3825 transitions. [2021-06-05 14:34:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:34:04,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:04,014 INFO L225 Difference]: With dead ends: 1320 [2021-06-05 14:34:04,014 INFO L226 Difference]: Without dead ends: 1250 [2021-06-05 14:34:04,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 2991.7ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:34:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-06-05 14:34:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 631. [2021-06-05 14:34:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 3.2634920634920634) internal successors, (2056), 630 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 2056 transitions. [2021-06-05 14:34:04,023 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 2056 transitions. Word has length 19 [2021-06-05 14:34:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:04,023 INFO L482 AbstractCegarLoop]: Abstraction has 631 states and 2056 transitions. [2021-06-05 14:34:04,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 2056 transitions. [2021-06-05 14:34:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:04,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:04,024 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:04,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-05 14:34:04,225 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1830486540, now seen corresponding path program 95 times [2021-06-05 14:34:04,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:04,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404677787] [2021-06-05 14:34:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:04,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:04,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404677787] [2021-06-05 14:34:04,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404677787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:04,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669114575] [2021-06-05 14:34:04,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:04,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:04,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:04,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:04,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:04,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:04,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:04,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:04,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:04,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:04,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:04,542 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:04,545 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:04,549 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:04,552 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:04,555 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:04,558 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:04,638 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-06-05 14:34:04,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:34:04,639 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-05 14:34:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:04,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669114575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:04,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:04,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:34:04,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033670563] [2021-06-05 14:34:04,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:04,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:04,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:04,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:04,842 INFO L87 Difference]: Start difference. First operand 631 states and 2056 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:05,222 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 14:34:05,351 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-05 14:34:05,524 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 14:34:05,655 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-06-05 14:34:05,839 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 14:34:05,982 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 14:34:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:06,023 INFO L93 Difference]: Finished difference Result 1010 states and 3060 transitions. [2021-06-05 14:34:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:06,024 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 14:34:06,025 INFO L226 Difference]: Without dead ends: 960 [2021-06-05 14:34:06,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1261.4ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:34:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-06-05 14:34:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 624. [2021-06-05 14:34:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 3.2520064205457464) internal successors, (2026), 623 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2026 transitions. [2021-06-05 14:34:06,032 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2026 transitions. Word has length 19 [2021-06-05 14:34:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:06,032 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 2026 transitions. [2021-06-05 14:34:06,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2026 transitions. [2021-06-05 14:34:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:06,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:06,033 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:06,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1751,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:06,233 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:06,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1145795884, now seen corresponding path program 96 times [2021-06-05 14:34:06,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:06,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816704521] [2021-06-05 14:34:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:06,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:06,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816704521] [2021-06-05 14:34:06,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816704521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:06,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423473900] [2021-06-05 14:34:06,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:06,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:06,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:06,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:06,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:06,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:06,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:06,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:06,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:06,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:06,674 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:34:06,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:06,675 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:34:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:06,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423473900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:06,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:06,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:06,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898102563] [2021-06-05 14:34:06,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:06,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:06,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:06,733 INFO L87 Difference]: Start difference. First operand 624 states and 2026 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:07,441 INFO L93 Difference]: Finished difference Result 868 states and 2676 transitions. [2021-06-05 14:34:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:34:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:07,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:07,442 INFO L225 Difference]: With dead ends: 868 [2021-06-05 14:34:07,442 INFO L226 Difference]: Without dead ends: 839 [2021-06-05 14:34:07,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 711.3ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:34:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-05 14:34:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 629. [2021-06-05 14:34:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2563694267515926) internal successors, (2045), 628 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-06-05 14:34:07,449 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-06-05 14:34:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:07,449 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-06-05 14:34:07,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-06-05 14:34:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:07,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:07,450 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:07,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-06-05 14:34:07,650 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:07,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:07,651 INFO L82 PathProgramCache]: Analyzing trace with hash -294642434, now seen corresponding path program 97 times [2021-06-05 14:34:07,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:07,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330257609] [2021-06-05 14:34:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:07,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:07,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330257609] [2021-06-05 14:34:07,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330257609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:07,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326030021] [2021-06-05 14:34:07,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:07,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:34:07,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:08,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:08,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:08,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:08,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:08,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:08,025 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:08,030 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:08,034 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:08,039 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:08,043 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:08,048 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:08,052 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:08,056 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:08,135 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-06-05 14:34:08,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:08,136 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 14:34:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:08,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326030021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:08,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:08,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:08,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123256661] [2021-06-05 14:34:08,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:08,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:08,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:08,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:08,283 INFO L87 Difference]: Start difference. First operand 629 states and 2045 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:08,830 INFO L93 Difference]: Finished difference Result 892 states and 2724 transitions. [2021-06-05 14:34:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:34:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:08,831 INFO L225 Difference]: With dead ends: 892 [2021-06-05 14:34:08,831 INFO L226 Difference]: Without dead ends: 842 [2021-06-05 14:34:08,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 615.1ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:34:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-05 14:34:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 629. [2021-06-05 14:34:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2563694267515926) internal successors, (2045), 628 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-06-05 14:34:08,838 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-06-05 14:34:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:08,838 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-06-05 14:34:08,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-06-05 14:34:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:08,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:08,839 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:09,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-06-05 14:34:09,039 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1854154102, now seen corresponding path program 98 times [2021-06-05 14:34:09,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:09,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120236709] [2021-06-05 14:34:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:09,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:09,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120236709] [2021-06-05 14:34:09,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120236709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:09,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926311821] [2021-06-05 14:34:09,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:09,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:09,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:09,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:09,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:09,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:09,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:09,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:09,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:09,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:09,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:09,391 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:09,394 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:09,397 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:09,401 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:09,404 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:09,407 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:09,465 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:34:09,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:09,466 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:34:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:09,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926311821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:09,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:09,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:09,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694850468] [2021-06-05 14:34:09,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:09,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:09,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:09,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:09,573 INFO L87 Difference]: Start difference. First operand 629 states and 2045 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:09,955 INFO L93 Difference]: Finished difference Result 819 states and 2567 transitions. [2021-06-05 14:34:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:09,957 INFO L225 Difference]: With dead ends: 819 [2021-06-05 14:34:09,957 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 14:34:09,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 473.0ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:34:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 14:34:09,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 629. [2021-06-05 14:34:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2563694267515926) internal successors, (2045), 628 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-06-05 14:34:09,964 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-06-05 14:34:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:09,964 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-06-05 14:34:09,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-06-05 14:34:09,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:09,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:09,964 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:10,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1797 [2021-06-05 14:34:10,165 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1330594314, now seen corresponding path program 99 times [2021-06-05 14:34:10,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:10,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218097678] [2021-06-05 14:34:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:10,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:10,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218097678] [2021-06-05 14:34:10,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218097678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:10,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174847951] [2021-06-05 14:34:10,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:10,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:10,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:10,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:10,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:10,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:10,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:10,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:10,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:10,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:10,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:10,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:10,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:10,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:10,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:10,550 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:10,591 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-06-05 14:34:10,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:10,592 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-06-05 14:34:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:10,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174847951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:10,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:10,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:10,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5266237] [2021-06-05 14:34:10,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:10,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:10,647 INFO L87 Difference]: Start difference. First operand 629 states and 2045 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:11,312 INFO L93 Difference]: Finished difference Result 971 states and 2936 transitions. [2021-06-05 14:34:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:11,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:11,313 INFO L225 Difference]: With dead ends: 971 [2021-06-05 14:34:11,313 INFO L226 Difference]: Without dead ends: 942 [2021-06-05 14:34:11,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 663.0ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:34:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-06-05 14:34:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 632. [2021-06-05 14:34:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.2646592709984152) internal successors, (2060), 631 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2060 transitions. [2021-06-05 14:34:11,321 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2060 transitions. Word has length 19 [2021-06-05 14:34:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:11,321 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2060 transitions. [2021-06-05 14:34:11,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:11,321 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2060 transitions. [2021-06-05 14:34:11,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:11,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:11,321 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:11,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1815,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:11,522 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:11,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1523934664, now seen corresponding path program 100 times [2021-06-05 14:34:11,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:11,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984720604] [2021-06-05 14:34:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:11,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:11,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984720604] [2021-06-05 14:34:11,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984720604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:11,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192580544] [2021-06-05 14:34:11,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:11,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:11,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:11,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:34:11,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:11,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:11,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:11,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:11,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:11,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:11,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:11,924 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:11,928 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:11,934 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:11,937 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:11,997 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-06-05 14:34:11,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:11,998 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 14:34:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:12,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192580544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:12,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:12,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:12,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216140991] [2021-06-05 14:34:12,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:12,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:12,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:12,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:12,105 INFO L87 Difference]: Start difference. First operand 632 states and 2060 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,527 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-06-05 14:34:12,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:12,976 INFO L93 Difference]: Finished difference Result 1072 states and 3158 transitions. [2021-06-05 14:34:12,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:12,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:12,978 INFO L225 Difference]: With dead ends: 1072 [2021-06-05 14:34:12,978 INFO L226 Difference]: Without dead ends: 1014 [2021-06-05 14:34:12,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:34:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-06-05 14:34:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 641. [2021-06-05 14:34:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 3.265625) internal successors, (2090), 640 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 2090 transitions. [2021-06-05 14:34:12,986 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 2090 transitions. Word has length 19 [2021-06-05 14:34:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:12,986 INFO L482 AbstractCegarLoop]: Abstraction has 641 states and 2090 transitions. [2021-06-05 14:34:12,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 2090 transitions. [2021-06-05 14:34:12,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:12,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:12,987 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:13,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1828,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:13,187 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:13,188 INFO L82 PathProgramCache]: Analyzing trace with hash -147828234, now seen corresponding path program 101 times [2021-06-05 14:34:13,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:13,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416463374] [2021-06-05 14:34:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:13,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:13,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416463374] [2021-06-05 14:34:13,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416463374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:13,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807979047] [2021-06-05 14:34:13,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:13,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:13,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:13,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:13,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:13,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:13,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:13,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:13,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:13,567 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:13,617 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-05 14:34:13,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:13,618 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-05 14:34:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:13,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807979047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:13,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:13,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:13,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096678248] [2021-06-05 14:34:13,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:13,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:13,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:13,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:13,709 INFO L87 Difference]: Start difference. First operand 641 states and 2090 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,304 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 14:34:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:14,599 INFO L93 Difference]: Finished difference Result 1019 states and 3029 transitions. [2021-06-05 14:34:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:34:14,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:14,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:14,601 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 14:34:14,601 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 14:34:14,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 899.3ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:34:14,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 14:34:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 639. [2021-06-05 14:34:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.261755485893417) internal successors, (2081), 638 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2081 transitions. [2021-06-05 14:34:14,609 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2081 transitions. Word has length 19 [2021-06-05 14:34:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:14,609 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 2081 transitions. [2021-06-05 14:34:14,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2081 transitions. [2021-06-05 14:34:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:14,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:14,610 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:14,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1846 [2021-06-05 14:34:14,810 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:14,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:14,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1431549238, now seen corresponding path program 102 times [2021-06-05 14:34:14,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:14,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191931508] [2021-06-05 14:34:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:15,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:15,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191931508] [2021-06-05 14:34:15,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191931508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:15,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025930586] [2021-06-05 14:34:15,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:15,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:15,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:15,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:15,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:15,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:15,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:15,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:15,241 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:15,246 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:15,250 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:15,255 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:15,259 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:15,263 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:15,267 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:15,271 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:15,276 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:15,280 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:15,284 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:15,288 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:15,292 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:15,296 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:15,300 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:15,304 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:15,307 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:15,311 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:15,471 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 14:34:15,471 INFO L628 ElimStorePlain]: treesize reduction 183, result has 49.4 percent of original size [2021-06-05 14:34:15,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:34:15,473 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:927, output treesize:179 [2021-06-05 14:34:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:15,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025930586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:15,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:15,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901812179] [2021-06-05 14:34:15,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:15,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:15,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:15,676 INFO L87 Difference]: Start difference. First operand 639 states and 2081 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,335 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 14:34:16,910 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-06-05 14:34:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:16,928 INFO L93 Difference]: Finished difference Result 1140 states and 3364 transitions. [2021-06-05 14:34:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:16,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:16,930 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 14:34:16,930 INFO L226 Difference]: Without dead ends: 1096 [2021-06-05 14:34:16,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1397.4ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:34:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-06-05 14:34:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 645. [2021-06-05 14:34:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.277950310559006) internal successors, (2111), 644 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2111 transitions. [2021-06-05 14:34:16,939 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2111 transitions. Word has length 19 [2021-06-05 14:34:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:16,939 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2111 transitions. [2021-06-05 14:34:16,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2111 transitions. [2021-06-05 14:34:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:16,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:16,940 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:17,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-06-05 14:34:17,141 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:17,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1571075658, now seen corresponding path program 103 times [2021-06-05 14:34:17,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:17,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935191882] [2021-06-05 14:34:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:17,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:17,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935191882] [2021-06-05 14:34:17,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935191882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:17,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870613875] [2021-06-05 14:34:17,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:17,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:34:17,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:17,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:17,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:17,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:17,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:17,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:17,543 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:17,547 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:17,550 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:17,555 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:17,559 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:17,562 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:17,566 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:17,570 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:17,574 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:17,577 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:17,777 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 14:34:17,777 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.7 percent of original size [2021-06-05 14:34:17,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:34:17,779 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-06-05 14:34:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:18,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870613875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:18,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:18,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:18,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314744247] [2021-06-05 14:34:18,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:18,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:18,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:18,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:18,080 INFO L87 Difference]: Start difference. First operand 645 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:18,772 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 14:34:18,976 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-05 14:34:19,158 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-06-05 14:34:19,349 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-05 14:34:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:19,647 INFO L93 Difference]: Finished difference Result 1125 states and 3321 transitions. [2021-06-05 14:34:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:34:19,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:19,649 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 14:34:19,649 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 14:34:19,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1691.9ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:34:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 14:34:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 644. [2021-06-05 14:34:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 3.2674961119751167) internal successors, (2101), 643 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 2101 transitions. [2021-06-05 14:34:19,657 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 2101 transitions. Word has length 19 [2021-06-05 14:34:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:19,657 INFO L482 AbstractCegarLoop]: Abstraction has 644 states and 2101 transitions. [2021-06-05 14:34:19,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 2101 transitions. [2021-06-05 14:34:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:19,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:19,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:19,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1880 [2021-06-05 14:34:19,859 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:19,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1009794104, now seen corresponding path program 104 times [2021-06-05 14:34:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:19,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874430475] [2021-06-05 14:34:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:20,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:20,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874430475] [2021-06-05 14:34:20,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874430475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:20,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085986686] [2021-06-05 14:34:20,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:20,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:20,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:20,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:20,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:20,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:20,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:20,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:20,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:20,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:20,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:20,263 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:20,266 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:20,270 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:20,274 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:20,278 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:20,281 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:20,340 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:34:20,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:20,341 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:34:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:20,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085986686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:20,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:20,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:34:20,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158449427] [2021-06-05 14:34:20,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:20,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:20,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:20,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:20,464 INFO L87 Difference]: Start difference. First operand 644 states and 2101 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:21,000 INFO L93 Difference]: Finished difference Result 868 states and 2721 transitions. [2021-06-05 14:34:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:21,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:21,002 INFO L225 Difference]: With dead ends: 868 [2021-06-05 14:34:21,002 INFO L226 Difference]: Without dead ends: 853 [2021-06-05 14:34:21,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:34:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-06-05 14:34:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 647. [2021-06-05 14:34:21,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 3.2755417956656347) internal successors, (2116), 646 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2116 transitions. [2021-06-05 14:34:21,009 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2116 transitions. Word has length 19 [2021-06-05 14:34:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:21,009 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 2116 transitions. [2021-06-05 14:34:21,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2116 transitions. [2021-06-05 14:34:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:21,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:21,010 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:21,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1903,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:21,210 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:21,210 INFO L82 PathProgramCache]: Analyzing trace with hash -258393666, now seen corresponding path program 105 times [2021-06-05 14:34:21,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:21,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052795160] [2021-06-05 14:34:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:21,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:21,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052795160] [2021-06-05 14:34:21,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052795160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:21,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132237898] [2021-06-05 14:34:21,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:21,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:34:21,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:21,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:34:21,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:21,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:21,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:21,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:21,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:21,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:21,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:21,517 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:21,528 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:21,533 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:21,537 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:21,541 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:21,545 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:21,549 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:21,553 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:21,557 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:21,561 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:21,564 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:21,568 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:21,572 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:21,773 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-05 14:34:21,773 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-06-05 14:34:21,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:34:21,776 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-05 14:34:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:22,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132237898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:22,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:22,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:34:22,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537393207] [2021-06-05 14:34:22,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:22,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:22,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:22,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:22,012 INFO L87 Difference]: Start difference. First operand 647 states and 2116 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:22,750 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 14:34:23,186 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 14:34:23,550 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 14:34:23,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:23,693 INFO L93 Difference]: Finished difference Result 1215 states and 3655 transitions. [2021-06-05 14:34:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:34:23,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:23,695 INFO L225 Difference]: With dead ends: 1215 [2021-06-05 14:34:23,695 INFO L226 Difference]: Without dead ends: 1125 [2021-06-05 14:34:23,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1627.4ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:34:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-06-05 14:34:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 674. [2021-06-05 14:34:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.335809806835067) internal successors, (2245), 673 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2245 transitions. [2021-06-05 14:34:23,704 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2245 transitions. Word has length 19 [2021-06-05 14:34:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:23,704 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2245 transitions. [2021-06-05 14:34:23,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2245 transitions. [2021-06-05 14:34:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:23,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:23,705 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:23,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1921 [2021-06-05 14:34:23,905 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:23,906 INFO L82 PathProgramCache]: Analyzing trace with hash 156959958, now seen corresponding path program 106 times [2021-06-05 14:34:23,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:23,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297203959] [2021-06-05 14:34:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:24,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:24,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297203959] [2021-06-05 14:34:24,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297203959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:24,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60381316] [2021-06-05 14:34:24,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:24,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:24,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:24,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:24,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:24,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:24,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:24,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:24,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:24,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:24,217 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:24,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:24,225 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:24,229 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:24,232 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:24,237 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:24,240 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:24,244 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:24,248 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:24,252 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:24,256 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:24,259 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:24,420 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 14:34:24,420 INFO L628 ElimStorePlain]: treesize reduction 178, result has 50.7 percent of original size [2021-06-05 14:34:24,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:34:24,422 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:183 [2021-06-05 14:34:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:24,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60381316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:24,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:24,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:34:24,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986590264] [2021-06-05 14:34:24,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:24,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:24,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:24,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:24,710 INFO L87 Difference]: Start difference. First operand 674 states and 2245 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:25,462 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 14:34:25,700 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-05 14:34:25,893 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 14:34:26,141 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-06-05 14:34:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:26,261 INFO L93 Difference]: Finished difference Result 1157 states and 3515 transitions. [2021-06-05 14:34:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:34:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:26,263 INFO L225 Difference]: With dead ends: 1157 [2021-06-05 14:34:26,263 INFO L226 Difference]: Without dead ends: 1084 [2021-06-05 14:34:26,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1537.8ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:34:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-06-05 14:34:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 666. [2021-06-05 14:34:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.3142857142857145) internal successors, (2204), 665 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2204 transitions. [2021-06-05 14:34:26,271 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2204 transitions. Word has length 19 [2021-06-05 14:34:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:26,271 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2204 transitions. [2021-06-05 14:34:26,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2204 transitions. [2021-06-05 14:34:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:26,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:26,272 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:26,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1938,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:26,473 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1691439274, now seen corresponding path program 107 times [2021-06-05 14:34:26,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:26,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482956330] [2021-06-05 14:34:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:26,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:26,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482956330] [2021-06-05 14:34:26,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482956330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:26,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466091476] [2021-06-05 14:34:26,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:26,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:26,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:26,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:26,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:26,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:26,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:26,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:26,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:26,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:34:26,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:34:26,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:33 [2021-06-05 14:34:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:26,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466091476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:26,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:26,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:34:26,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594248232] [2021-06-05 14:34:26,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:26,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:26,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:26,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:26,891 INFO L87 Difference]: Start difference. First operand 666 states and 2204 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:27,785 INFO L93 Difference]: Finished difference Result 1001 states and 3102 transitions. [2021-06-05 14:34:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:27,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:27,787 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 14:34:27,787 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 14:34:27,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 863.5ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:34:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 14:34:27,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 672. [2021-06-05 14:34:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.3278688524590163) internal successors, (2233), 671 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-06-05 14:34:27,795 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-06-05 14:34:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:27,795 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-06-05 14:34:27,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-06-05 14:34:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:27,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:27,795 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:27,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1958,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:27,996 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash 251000956, now seen corresponding path program 108 times [2021-06-05 14:34:27,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:27,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055250682] [2021-06-05 14:34:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:28,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:28,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055250682] [2021-06-05 14:34:28,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055250682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:28,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015006435] [2021-06-05 14:34:28,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:28,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:28,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:28,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:28,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:28,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:28,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:28,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:28,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:28,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:28,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:28,379 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:28,382 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:28,385 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:28,388 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:28,439 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-06-05 14:34:28,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:28,440 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:34:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:28,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015006435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:28,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:28,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145132448] [2021-06-05 14:34:28,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:28,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:28,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:28,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:28,540 INFO L87 Difference]: Start difference. First operand 672 states and 2233 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:29,323 INFO L93 Difference]: Finished difference Result 1043 states and 3174 transitions. [2021-06-05 14:34:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:34:29,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:29,324 INFO L225 Difference]: With dead ends: 1043 [2021-06-05 14:34:29,324 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 14:34:29,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 797.3ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:34:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 14:34:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 672. [2021-06-05 14:34:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.3278688524590163) internal successors, (2233), 671 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-06-05 14:34:29,333 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-06-05 14:34:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:29,333 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-06-05 14:34:29,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-06-05 14:34:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:29,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:29,334 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:29,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1968 [2021-06-05 14:34:29,535 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:29,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:29,535 INFO L82 PathProgramCache]: Analyzing trace with hash 158615530, now seen corresponding path program 109 times [2021-06-05 14:34:29,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:29,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635733416] [2021-06-05 14:34:29,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:29,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:29,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635733416] [2021-06-05 14:34:29,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635733416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:29,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155164211] [2021-06-05 14:34:29,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:34:29,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:29,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:29,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:29,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:29,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:29,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:29,973 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:29,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:29,982 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:29,987 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:29,991 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:29,996 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:29,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:30,000 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:30,006 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:30,010 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:30,014 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:30,018 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:30,022 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:30,026 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:30,030 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:30,034 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:30,038 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:30,042 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:30,046 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:30,050 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:30,054 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:30,268 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-05 14:34:30,269 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-06-05 14:34:30,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:34:30,271 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-06-05 14:34:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:30,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155164211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:30,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:30,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:34:30,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128933586] [2021-06-05 14:34:30,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:30,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:30,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:30,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:30,517 INFO L87 Difference]: Start difference. First operand 672 states and 2233 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:31,608 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-06-05 14:34:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:31,632 INFO L93 Difference]: Finished difference Result 1195 states and 3544 transitions. [2021-06-05 14:34:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:31,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:31,633 INFO L225 Difference]: With dead ends: 1195 [2021-06-05 14:34:31,633 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 14:34:31,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1304.8ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:34:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 14:34:31,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 678. [2021-06-05 14:34:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.342688330871492) internal successors, (2263), 677 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2263 transitions. [2021-06-05 14:34:31,642 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2263 transitions. Word has length 19 [2021-06-05 14:34:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:31,643 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 2263 transitions. [2021-06-05 14:34:31,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:31,643 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2263 transitions. [2021-06-05 14:34:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:31,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:31,643 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:31,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:31,844 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:31,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1450957930, now seen corresponding path program 110 times [2021-06-05 14:34:31,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:31,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206256822] [2021-06-05 14:34:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:32,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:32,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206256822] [2021-06-05 14:34:32,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206256822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:32,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720107017] [2021-06-05 14:34:32,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:32,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:32,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:32,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:32,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:32,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:32,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:32,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:32,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:32,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:32,281 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:32,285 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:32,290 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:32,294 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:32,298 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:32,303 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:32,307 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:32,310 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:32,314 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:32,318 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:32,322 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:32,326 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:32,482 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 14:34:32,482 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.3 percent of original size [2021-06-05 14:34:32,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:34:32,484 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-06-05 14:34:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:32,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720107017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:32,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:32,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:34:32,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875950365] [2021-06-05 14:34:32,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:34:32,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:32,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:34:32,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:34:32,764 INFO L87 Difference]: Start difference. First operand 678 states and 2263 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:33,350 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-05 14:34:33,504 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 14:34:33,728 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-05 14:34:33,972 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-06-05 14:34:34,240 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 14:34:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:34,393 INFO L93 Difference]: Finished difference Result 1109 states and 3354 transitions. [2021-06-05 14:34:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:34,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:34,395 INFO L225 Difference]: With dead ends: 1109 [2021-06-05 14:34:34,395 INFO L226 Difference]: Without dead ends: 1079 [2021-06-05 14:34:34,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1765.7ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:34:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-05 14:34:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 672. [2021-06-05 14:34:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.3278688524590163) internal successors, (2233), 671 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-06-05 14:34:34,404 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-06-05 14:34:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:34,404 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-06-05 14:34:34,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-06-05 14:34:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:34,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:34,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:34,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2001 [2021-06-05 14:34:34,606 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash 228725566, now seen corresponding path program 111 times [2021-06-05 14:34:34,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:34,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900763320] [2021-06-05 14:34:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:34,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:34,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900763320] [2021-06-05 14:34:34,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900763320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:34,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153806667] [2021-06-05 14:34:34,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:34,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:34,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:34,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:34,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:34,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:34,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:34,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:34,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:34,883 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:34,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:34,889 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:34,892 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:34,972 INFO L628 ElimStorePlain]: treesize reduction 31, result has 75.6 percent of original size [2021-06-05 14:34:34,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:34:34,973 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:96 [2021-06-05 14:34:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:35,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153806667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:35,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:35,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:35,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998490125] [2021-06-05 14:34:35,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:35,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:35,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:35,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:35,215 INFO L87 Difference]: Start difference. First operand 672 states and 2233 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:35,727 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-05 14:34:36,297 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-06-05 14:34:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:36,328 INFO L93 Difference]: Finished difference Result 1335 states and 4006 transitions. [2021-06-05 14:34:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:34:36,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:36,330 INFO L225 Difference]: With dead ends: 1335 [2021-06-05 14:34:36,330 INFO L226 Difference]: Without dead ends: 1269 [2021-06-05 14:34:36,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1113.0ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:34:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-05 14:34:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 684. [2021-06-05 14:34:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.348462664714495) internal successors, (2287), 683 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2287 transitions. [2021-06-05 14:34:36,340 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2287 transitions. Word has length 19 [2021-06-05 14:34:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:36,340 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 2287 transitions. [2021-06-05 14:34:36,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2287 transitions. [2021-06-05 14:34:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:36,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:36,341 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:36,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2024 [2021-06-05 14:34:36,542 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:36,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:36,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1521067966, now seen corresponding path program 112 times [2021-06-05 14:34:36,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:36,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344043330] [2021-06-05 14:34:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:36,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344043330] [2021-06-05 14:34:36,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344043330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307255867] [2021-06-05 14:34:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:36,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:36,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:36,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:36,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:36,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:36,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:36,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:36,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:36,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:36,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:36,839 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:36,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:36,845 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:36,925 INFO L628 ElimStorePlain]: treesize reduction 35, result has 73.3 percent of original size [2021-06-05 14:34:36,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:34:36,926 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:96 [2021-06-05 14:34:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:37,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307255867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:37,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:37,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:37,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807071465] [2021-06-05 14:34:37,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:37,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:37,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:37,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:37,212 INFO L87 Difference]: Start difference. First operand 684 states and 2287 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:37,724 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-05 14:34:37,925 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 14:34:38,112 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 14:34:38,301 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-06-05 14:34:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:38,601 INFO L93 Difference]: Finished difference Result 1330 states and 3994 transitions. [2021-06-05 14:34:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:34:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:38,603 INFO L225 Difference]: With dead ends: 1330 [2021-06-05 14:34:38,603 INFO L226 Difference]: Without dead ends: 1300 [2021-06-05 14:34:38,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1401.6ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:34:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-06-05 14:34:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 676. [2021-06-05 14:34:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.334814814814815) internal successors, (2251), 675 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2251 transitions. [2021-06-05 14:34:38,614 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2251 transitions. Word has length 19 [2021-06-05 14:34:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:38,614 INFO L482 AbstractCegarLoop]: Abstraction has 676 states and 2251 transitions. [2021-06-05 14:34:38,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2251 transitions. [2021-06-05 14:34:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:38,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:38,615 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:38,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:38,815 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1561740112, now seen corresponding path program 113 times [2021-06-05 14:34:38,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:38,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443667483] [2021-06-05 14:34:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:38,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:38,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443667483] [2021-06-05 14:34:38,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443667483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:38,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894570336] [2021-06-05 14:34:38,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:39,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:39,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:39,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:39,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:39,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:39,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:39,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:39,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:39,183 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:39,187 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:39,191 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:39,194 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:39,289 INFO L628 ElimStorePlain]: treesize reduction 46, result has 69.1 percent of original size [2021-06-05 14:34:39,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:34:39,291 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:310, output treesize:103 [2021-06-05 14:34:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:39,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894570336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:39,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:39,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:34:39,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37877894] [2021-06-05 14:34:39,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:39,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:39,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:39,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:39,497 INFO L87 Difference]: Start difference. First operand 676 states and 2251 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:40,159 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-06-05 14:34:40,323 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 14:34:40,529 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-06-05 14:34:40,888 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-05 14:34:41,105 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2021-06-05 14:34:41,392 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-06-05 14:34:41,645 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-05 14:34:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:41,646 INFO L93 Difference]: Finished difference Result 1173 states and 3540 transitions. [2021-06-05 14:34:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:34:41,646 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:41,647 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 14:34:41,647 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 14:34:41,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2224.5ms TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:34:41,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 14:34:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 673. [2021-06-05 14:34:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.3407738095238093) internal successors, (2245), 672 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2245 transitions. [2021-06-05 14:34:41,656 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2245 transitions. Word has length 19 [2021-06-05 14:34:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:41,656 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2245 transitions. [2021-06-05 14:34:41,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2245 transitions. [2021-06-05 14:34:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:41,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:41,657 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:41,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-06-05 14:34:41,857 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:41,857 INFO L82 PathProgramCache]: Analyzing trace with hash -330290710, now seen corresponding path program 114 times [2021-06-05 14:34:41,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:41,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955056038] [2021-06-05 14:34:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:41,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:41,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955056038] [2021-06-05 14:34:41,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955056038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:41,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750303672] [2021-06-05 14:34:41,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:42,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:42,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:42,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:42,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:42,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:42,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:42,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:42,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:42,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:42,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:42,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:42,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:42,253 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:34:42,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:42,254 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:34:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:42,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750303672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:42,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:42,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:34:42,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754988884] [2021-06-05 14:34:42,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:34:42,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:42,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:34:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:34:42,309 INFO L87 Difference]: Start difference. First operand 673 states and 2245 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:43,064 INFO L93 Difference]: Finished difference Result 947 states and 2977 transitions. [2021-06-05 14:34:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:43,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:43,066 INFO L225 Difference]: With dead ends: 947 [2021-06-05 14:34:43,066 INFO L226 Difference]: Without dead ends: 932 [2021-06-05 14:34:43,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:34:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-06-05 14:34:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 674. [2021-06-05 14:34:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.3432392273402676) internal successors, (2250), 673 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2250 transitions. [2021-06-05 14:34:43,074 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2250 transitions. Word has length 19 [2021-06-05 14:34:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:43,074 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2250 transitions. [2021-06-05 14:34:43,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2250 transitions. [2021-06-05 14:34:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:43,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:43,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:43,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:43,297 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:43,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:43,298 INFO L82 PathProgramCache]: Analyzing trace with hash 20330052, now seen corresponding path program 115 times [2021-06-05 14:34:43,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:43,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758556589] [2021-06-05 14:34:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:43,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:43,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758556589] [2021-06-05 14:34:43,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758556589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:43,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645257612] [2021-06-05 14:34:43,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:43,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:43,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:43,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:43,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:43,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:43,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:43,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:43,651 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:43,654 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:43,657 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:43,660 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:43,663 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:43,743 INFO L628 ElimStorePlain]: treesize reduction 28, result has 77.4 percent of original size [2021-06-05 14:34:43,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:34:43,745 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:243, output treesize:96 [2021-06-05 14:34:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:43,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645257612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:43,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:43,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:34:43,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941814627] [2021-06-05 14:34:43,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:34:43,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:34:43,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:34:43,857 INFO L87 Difference]: Start difference. First operand 674 states and 2250 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:44,494 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 14:34:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:45,106 INFO L93 Difference]: Finished difference Result 1151 states and 3502 transitions. [2021-06-05 14:34:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:34:45,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:45,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:45,108 INFO L225 Difference]: With dead ends: 1151 [2021-06-05 14:34:45,108 INFO L226 Difference]: Without dead ends: 1101 [2021-06-05 14:34:45,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1196.1ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:34:45,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-06-05 14:34:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 683. [2021-06-05 14:34:45,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.341642228739003) internal successors, (2279), 682 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2279 transitions. [2021-06-05 14:34:45,117 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2279 transitions. Word has length 19 [2021-06-05 14:34:45,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:45,118 INFO L482 AbstractCegarLoop]: Abstraction has 683 states and 2279 transitions. [2021-06-05 14:34:45,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2279 transitions. [2021-06-05 14:34:45,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:45,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:45,118 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:45,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2099,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:45,320 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:45,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:45,320 INFO L82 PathProgramCache]: Analyzing trace with hash -52617630, now seen corresponding path program 116 times [2021-06-05 14:34:45,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:45,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199289982] [2021-06-05 14:34:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:45,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199289982] [2021-06-05 14:34:45,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199289982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806684227] [2021-06-05 14:34:45,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:45,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:45,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:45,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:45,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:45,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:45,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:45,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:45,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:45,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:45,700 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:45,703 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:45,739 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 14:34:45,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:45,739 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 14:34:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:45,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806684227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:45,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:45,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:45,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77204160] [2021-06-05 14:34:45,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:45,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:45,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:45,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:45,790 INFO L87 Difference]: Start difference. First operand 683 states and 2279 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:46,234 INFO L93 Difference]: Finished difference Result 871 states and 2801 transitions. [2021-06-05 14:34:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:34:46,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:46,236 INFO L225 Difference]: With dead ends: 871 [2021-06-05 14:34:46,236 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 14:34:46,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:34:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 14:34:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 689. [2021-06-05 14:34:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 3.3401162790697674) internal successors, (2298), 688 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 2298 transitions. [2021-06-05 14:34:46,243 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 2298 transitions. Word has length 19 [2021-06-05 14:34:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:46,243 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 2298 transitions. [2021-06-05 14:34:46,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:46,243 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 2298 transitions. [2021-06-05 14:34:46,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:46,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:46,244 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:46,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2118,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:46,449 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1493055948, now seen corresponding path program 117 times [2021-06-05 14:34:46,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:46,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522044420] [2021-06-05 14:34:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:46,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:46,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522044420] [2021-06-05 14:34:46,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522044420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:46,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481582826] [2021-06-05 14:34:46,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:46,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:46,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:46,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:46,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:46,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:46,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:46,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:46,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:46,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:46,775 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:46,778 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:46,781 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:46,784 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:46,788 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:46,790 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:46,846 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-06-05 14:34:46,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:46,847 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-06-05 14:34:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:46,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481582826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:46,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:46,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:46,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942522477] [2021-06-05 14:34:46,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:46,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:46,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:46,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:46,949 INFO L87 Difference]: Start difference. First operand 689 states and 2298 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:47,421 INFO L93 Difference]: Finished difference Result 878 states and 2816 transitions. [2021-06-05 14:34:47,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:47,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:47,423 INFO L225 Difference]: With dead ends: 878 [2021-06-05 14:34:47,423 INFO L226 Difference]: Without dead ends: 863 [2021-06-05 14:34:47,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 547.2ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:34:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-06-05 14:34:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 686. [2021-06-05 14:34:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 3.3386861313868614) internal successors, (2287), 685 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2287 transitions. [2021-06-05 14:34:47,430 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2287 transitions. Word has length 19 [2021-06-05 14:34:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:47,430 INFO L482 AbstractCegarLoop]: Abstraction has 686 states and 2287 transitions. [2021-06-05 14:34:47,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2287 transitions. [2021-06-05 14:34:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:47,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:47,431 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:47,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2128 [2021-06-05 14:34:47,632 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash 655740588, now seen corresponding path program 118 times [2021-06-05 14:34:47,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:47,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037731250] [2021-06-05 14:34:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:47,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:47,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037731250] [2021-06-05 14:34:47,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037731250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:47,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80449410] [2021-06-05 14:34:47,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:47,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:47,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:47,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:47,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:47,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:47,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:47,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:47,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:48,002 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:48,005 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:48,009 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:48,012 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:48,060 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-06-05 14:34:48,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:48,061 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-06-05 14:34:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:48,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80449410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:48,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:48,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:48,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438914060] [2021-06-05 14:34:48,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:48,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:48,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:48,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:48,154 INFO L87 Difference]: Start difference. First operand 686 states and 2287 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:48,919 INFO L93 Difference]: Finished difference Result 1022 states and 3167 transitions. [2021-06-05 14:34:48,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:48,919 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:48,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:48,921 INFO L225 Difference]: With dead ends: 1022 [2021-06-05 14:34:48,921 INFO L226 Difference]: Without dead ends: 1007 [2021-06-05 14:34:48,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:34:48,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-06-05 14:34:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 686. [2021-06-05 14:34:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 3.3386861313868614) internal successors, (2287), 685 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2287 transitions. [2021-06-05 14:34:48,929 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2287 transitions. Word has length 19 [2021-06-05 14:34:48,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:48,929 INFO L482 AbstractCegarLoop]: Abstraction has 686 states and 2287 transitions. [2021-06-05 14:34:48,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:48,929 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2287 transitions. [2021-06-05 14:34:48,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:48,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:48,930 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:49,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2144 [2021-06-05 14:34:49,131 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:49,131 INFO L82 PathProgramCache]: Analyzing trace with hash -356951944, now seen corresponding path program 119 times [2021-06-05 14:34:49,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:49,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966017771] [2021-06-05 14:34:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:49,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:49,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966017771] [2021-06-05 14:34:49,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966017771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:49,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684396869] [2021-06-05 14:34:49,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:49,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:34:49,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:49,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:49,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:49,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:49,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:49,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:49,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:49,521 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:49,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:49,528 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:49,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:49,536 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:49,539 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:49,542 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:49,546 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:49,549 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:49,612 INFO L628 ElimStorePlain]: treesize reduction 70, result has 45.7 percent of original size [2021-06-05 14:34:49,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:49,613 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:458, output treesize:59 [2021-06-05 14:34:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:49,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684396869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:49,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:49,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:49,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902679637] [2021-06-05 14:34:49,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:49,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:49,718 INFO L87 Difference]: Start difference. First operand 686 states and 2287 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:50,345 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:34:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:50,965 INFO L93 Difference]: Finished difference Result 1128 states and 3408 transitions. [2021-06-05 14:34:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:34:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:50,967 INFO L225 Difference]: With dead ends: 1128 [2021-06-05 14:34:50,967 INFO L226 Difference]: Without dead ends: 1049 [2021-06-05 14:34:50,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1240.3ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:34:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-06-05 14:34:50,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 698. [2021-06-05 14:34:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.340028694404591) internal successors, (2328), 697 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2328 transitions. [2021-06-05 14:34:50,976 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2328 transitions. Word has length 19 [2021-06-05 14:34:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:50,976 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 2328 transitions. [2021-06-05 14:34:50,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2328 transitions. [2021-06-05 14:34:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:50,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:50,977 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:51,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2161,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:51,177 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:51,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2094087908, now seen corresponding path program 120 times [2021-06-05 14:34:51,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:51,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186097721] [2021-06-05 14:34:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:51,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:51,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186097721] [2021-06-05 14:34:51,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186097721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:51,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155554023] [2021-06-05 14:34:51,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:51,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:51,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:51,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:51,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:51,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:51,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:51,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:51,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:51,640 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:51,643 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:51,646 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:51,649 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:51,687 INFO L628 ElimStorePlain]: treesize reduction 65, result has 39.8 percent of original size [2021-06-05 14:34:51,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:51,688 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:240, output treesize:43 [2021-06-05 14:34:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:51,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155554023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:51,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:51,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:51,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349989568] [2021-06-05 14:34:51,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:51,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:51,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:51,736 INFO L87 Difference]: Start difference. First operand 698 states and 2328 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:52,353 INFO L93 Difference]: Finished difference Result 905 states and 2904 transitions. [2021-06-05 14:34:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:34:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:52,355 INFO L225 Difference]: With dead ends: 905 [2021-06-05 14:34:52,355 INFO L226 Difference]: Without dead ends: 890 [2021-06-05 14:34:52,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 737.6ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:34:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-06-05 14:34:52,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 705. [2021-06-05 14:34:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.3423295454545454) internal successors, (2353), 704 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2353 transitions. [2021-06-05 14:34:52,363 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2353 transitions. Word has length 19 [2021-06-05 14:34:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:52,363 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2353 transitions. [2021-06-05 14:34:52,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2353 transitions. [2021-06-05 14:34:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:52,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:52,364 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:52,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2180,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:52,564 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash 760441070, now seen corresponding path program 121 times [2021-06-05 14:34:52,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:52,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759460750] [2021-06-05 14:34:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:52,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:52,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759460750] [2021-06-05 14:34:52,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759460750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:52,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441908567] [2021-06-05 14:34:52,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:52,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:34:52,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:52,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:52,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:52,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:52,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:52,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:52,973 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:52,976 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:52,980 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:52,983 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:52,987 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:52,990 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:52,994 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:52,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:52,997 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:53,063 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 14:34:53,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:53,064 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-06-05 14:34:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:53,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441908567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:53,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:53,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:53,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540081937] [2021-06-05 14:34:53,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:53,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:53,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:53,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:53,165 INFO L87 Difference]: Start difference. First operand 705 states and 2353 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:53,806 INFO L93 Difference]: Finished difference Result 967 states and 3033 transitions. [2021-06-05 14:34:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:53,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:53,808 INFO L225 Difference]: With dead ends: 967 [2021-06-05 14:34:53,808 INFO L226 Difference]: Without dead ends: 924 [2021-06-05 14:34:53,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 761.0ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:34:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-06-05 14:34:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 708. [2021-06-05 14:34:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.3394625176803396) internal successors, (2361), 707 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2361 transitions. [2021-06-05 14:34:53,815 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2361 transitions. Word has length 19 [2021-06-05 14:34:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:53,815 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2361 transitions. [2021-06-05 14:34:53,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2361 transitions. [2021-06-05 14:34:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:53,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:53,816 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:54,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:54,017 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:54,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1385729690, now seen corresponding path program 122 times [2021-06-05 14:34:54,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:54,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291469153] [2021-06-05 14:34:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:54,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:54,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291469153] [2021-06-05 14:34:54,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291469153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:54,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562927157] [2021-06-05 14:34:54,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:54,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:54,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:54,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:54,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:54,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:54,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:54,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:54,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:54,379 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:54,389 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:54,392 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:54,395 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:54,399 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:54,402 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:54,405 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:54,457 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-05 14:34:54,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:54,458 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:409, output treesize:61 [2021-06-05 14:34:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:54,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562927157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:54,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:54,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:54,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65873476] [2021-06-05 14:34:54,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:54,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:54,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:54,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:54,542 INFO L87 Difference]: Start difference. First operand 708 states and 2361 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:55,097 INFO L93 Difference]: Finished difference Result 934 states and 2969 transitions. [2021-06-05 14:34:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:34:55,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:55,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:55,098 INFO L225 Difference]: With dead ends: 934 [2021-06-05 14:34:55,098 INFO L226 Difference]: Without dead ends: 919 [2021-06-05 14:34:55,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 627.0ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:34:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-06-05 14:34:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 708. [2021-06-05 14:34:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.3394625176803396) internal successors, (2361), 707 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2361 transitions. [2021-06-05 14:34:55,107 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2361 transitions. Word has length 19 [2021-06-05 14:34:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:55,107 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2361 transitions. [2021-06-05 14:34:55,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2361 transitions. [2021-06-05 14:34:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:55,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:55,107 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:55,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2209 [2021-06-05 14:34:55,308 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash -275510810, now seen corresponding path program 123 times [2021-06-05 14:34:55,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:55,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147413520] [2021-06-05 14:34:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:55,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:55,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147413520] [2021-06-05 14:34:55,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147413520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:55,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417052227] [2021-06-05 14:34:55,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:55,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:34:55,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:55,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:55,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:55,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:34:55,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:55,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:55,782 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-06-05 14:34:55,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:55,783 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-06-05 14:34:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:55,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417052227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:55,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:55,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:55,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865761437] [2021-06-05 14:34:55,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:55,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:55,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:55,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:55,853 INFO L87 Difference]: Start difference. First operand 708 states and 2361 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:56,483 INFO L93 Difference]: Finished difference Result 916 states and 2941 transitions. [2021-06-05 14:34:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:56,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:56,485 INFO L225 Difference]: With dead ends: 916 [2021-06-05 14:34:56,485 INFO L226 Difference]: Without dead ends: 901 [2021-06-05 14:34:56,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 731.7ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:34:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-05 14:34:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 714. [2021-06-05 14:34:56,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.347826086956522) internal successors, (2387), 713 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2387 transitions. [2021-06-05 14:34:56,492 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2387 transitions. Word has length 19 [2021-06-05 14:34:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:56,492 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2387 transitions. [2021-06-05 14:34:56,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2387 transitions. [2021-06-05 14:34:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:56,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:56,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:56,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2230,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:56,694 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:56,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:56,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1715949128, now seen corresponding path program 124 times [2021-06-05 14:34:56,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:56,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429111302] [2021-06-05 14:34:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:56,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:56,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429111302] [2021-06-05 14:34:56,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429111302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:56,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337692849] [2021-06-05 14:34:56,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:56,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:34:56,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:56,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:34:56,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:57,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:57,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:57,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:34:57,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:57,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:57,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:57,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:34:57,126 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:57,130 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:57,134 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:57,209 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-05 14:34:57,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:57,211 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 14:34:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:57,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337692849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:57,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:57,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:57,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243223268] [2021-06-05 14:34:57,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:57,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:57,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:57,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:57,318 INFO L87 Difference]: Start difference. First operand 714 states and 2387 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:57,841 INFO L93 Difference]: Finished difference Result 971 states and 3048 transitions. [2021-06-05 14:34:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:34:57,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:57,842 INFO L225 Difference]: With dead ends: 971 [2021-06-05 14:34:57,842 INFO L226 Difference]: Without dead ends: 928 [2021-06-05 14:34:57,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:34:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-06-05 14:34:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 714. [2021-06-05 14:34:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.347826086956522) internal successors, (2387), 713 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2387 transitions. [2021-06-05 14:34:57,850 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2387 transitions. Word has length 19 [2021-06-05 14:34:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:57,850 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2387 transitions. [2021-06-05 14:34:57,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2387 transitions. [2021-06-05 14:34:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:57,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:57,851 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:58,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-06-05 14:34:58,052 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:58,052 INFO L82 PathProgramCache]: Analyzing trace with hash 907255270, now seen corresponding path program 125 times [2021-06-05 14:34:58,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:58,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273114876] [2021-06-05 14:34:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:58,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:58,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273114876] [2021-06-05 14:34:58,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273114876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:58,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749888495] [2021-06-05 14:34:58,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:58,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:34:58,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:58,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:58,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:58,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:58,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:58,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:34:58,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:34:58,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:58,584 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:34:58,587 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:34:58,590 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:34:58,635 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-05 14:34:58,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:34:58,636 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:242, output treesize:55 [2021-06-05 14:34:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:58,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749888495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:58,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:34:58,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:34:58,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246765852] [2021-06-05 14:34:58,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:34:58,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:34:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:34:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:34:58,720 INFO L87 Difference]: Start difference. First operand 714 states and 2387 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,207 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-05 14:34:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:34:59,361 INFO L93 Difference]: Finished difference Result 913 states and 2929 transitions. [2021-06-05 14:34:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:34:59,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:34:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:34:59,363 INFO L225 Difference]: With dead ends: 913 [2021-06-05 14:34:59,363 INFO L226 Difference]: Without dead ends: 898 [2021-06-05 14:34:59,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 878.2ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:34:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-06-05 14:34:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 712. [2021-06-05 14:34:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.3445850914205346) internal successors, (2378), 711 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2378 transitions. [2021-06-05 14:34:59,371 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2378 transitions. Word has length 19 [2021-06-05 14:34:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:34:59,371 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 2378 transitions. [2021-06-05 14:34:59,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:34:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2378 transitions. [2021-06-05 14:34:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:34:59,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:34:59,372 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:34:59,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2263,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:59,572 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:34:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:34:59,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1808334554, now seen corresponding path program 126 times [2021-06-05 14:34:59,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:34:59,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292653994] [2021-06-05 14:34:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:34:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:34:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:34:59,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:34:59,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292653994] [2021-06-05 14:34:59,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292653994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:34:59,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895622469] [2021-06-05 14:34:59,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:34:59,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:34:59,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:34:59,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:34:59,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:34:59,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:34:59,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:00,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:00,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:00,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:00,022 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:00,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:00,031 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:00,044 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:00,048 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:00,053 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:00,058 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:00,062 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:00,066 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:00,070 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:00,074 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:00,079 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:00,083 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:00,087 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:00,091 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:00,095 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:00,099 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:00,103 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:00,107 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:00,111 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:00,115 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:00,120 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:00,123 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:00,127 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:00,293 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-06-05 14:35:00,294 INFO L628 ElimStorePlain]: treesize reduction 291, result has 38.1 percent of original size [2021-06-05 14:35:00,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:00,296 INFO L247 ElimStorePlain]: Needed 29 recursive calls to eliminate 1 variables, input treesize:1167, output treesize:179 [2021-06-05 14:35:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:00,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895622469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:00,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:00,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:00,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144025075] [2021-06-05 14:35:00,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:00,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:00,493 INFO L87 Difference]: Start difference. First operand 712 states and 2378 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:00,986 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 14:35:01,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:01,205 INFO L93 Difference]: Finished difference Result 973 states and 3089 transitions. [2021-06-05 14:35:01,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:01,207 INFO L225 Difference]: With dead ends: 973 [2021-06-05 14:35:01,207 INFO L226 Difference]: Without dead ends: 958 [2021-06-05 14:35:01,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 920.8ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-06-05 14:35:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 715. [2021-06-05 14:35:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.3515406162464987) internal successors, (2393), 714 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2393 transitions. [2021-06-05 14:35:01,215 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2393 transitions. Word has length 19 [2021-06-05 14:35:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:01,215 INFO L482 AbstractCegarLoop]: Abstraction has 715 states and 2393 transitions. [2021-06-05 14:35:01,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2393 transitions. [2021-06-05 14:35:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:01,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:01,216 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:01,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2280,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:01,416 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash -515992154, now seen corresponding path program 127 times [2021-06-05 14:35:01,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:01,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374059110] [2021-06-05 14:35:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:01,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:01,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374059110] [2021-06-05 14:35:01,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374059110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:01,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367604452] [2021-06-05 14:35:01,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:01,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:35:01,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:01,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:01,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:01,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:01,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:01,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:01,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:01,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:01,888 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:01,892 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:01,897 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:01,901 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:01,905 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:01,910 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:01,913 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:01,918 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:01,922 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:01,927 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:01,931 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:01,935 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:01,939 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:01,943 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:01,947 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:01,951 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:01,954 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:01,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:01,958 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:02,175 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 14:35:02,175 INFO L628 ElimStorePlain]: treesize reduction 103, result has 68.3 percent of original size [2021-06-05 14:35:02,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:35:02,177 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1063, output treesize:222 [2021-06-05 14:35:02,299 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 14:35:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:02,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367604452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:02,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:02,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:02,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237317913] [2021-06-05 14:35:02,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:02,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:02,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:02,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:02,566 INFO L87 Difference]: Start difference. First operand 715 states and 2393 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:03,028 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 14:35:03,247 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 14:35:03,546 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 14:35:03,960 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 14:35:04,153 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-06-05 14:35:04,573 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 14:35:04,775 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 14:35:05,054 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 14:35:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:05,100 INFO L93 Difference]: Finished difference Result 974 states and 3073 transitions. [2021-06-05 14:35:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:05,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:05,101 INFO L225 Difference]: With dead ends: 974 [2021-06-05 14:35:05,101 INFO L226 Difference]: Without dead ends: 952 [2021-06-05 14:35:05,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2742.1ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:35:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-06-05 14:35:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 712. [2021-06-05 14:35:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.3445850914205346) internal successors, (2378), 711 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2378 transitions. [2021-06-05 14:35:05,109 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2378 transitions. Word has length 19 [2021-06-05 14:35:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:05,109 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 2378 transitions. [2021-06-05 14:35:05,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2378 transitions. [2021-06-05 14:35:05,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:05,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:05,110 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:05,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-06-05 14:35:05,311 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:05,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:05,311 INFO L82 PathProgramCache]: Analyzing trace with hash 45289400, now seen corresponding path program 128 times [2021-06-05 14:35:05,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:05,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92665838] [2021-06-05 14:35:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:05,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:05,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92665838] [2021-06-05 14:35:05,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92665838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:05,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867567200] [2021-06-05 14:35:05,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:05,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:05,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:05,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:05,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:05,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:05,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:05,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:05,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:05,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:05,822 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:05,825 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:05,829 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:05,831 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:05,880 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-06-05 14:35:05,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:05,881 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-06-05 14:35:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:05,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867567200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:05,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:05,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:05,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121098835] [2021-06-05 14:35:05,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:05,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:05,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:05,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:05,984 INFO L87 Difference]: Start difference. First operand 712 states and 2378 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:06,488 INFO L93 Difference]: Finished difference Result 1031 states and 3231 transitions. [2021-06-05 14:35:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:06,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:06,490 INFO L225 Difference]: With dead ends: 1031 [2021-06-05 14:35:06,490 INFO L226 Difference]: Without dead ends: 1016 [2021-06-05 14:35:06,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:35:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-06-05 14:35:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 715. [2021-06-05 14:35:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.3515406162464987) internal successors, (2393), 714 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2393 transitions. [2021-06-05 14:35:06,498 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2393 transitions. Word has length 19 [2021-06-05 14:35:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:06,498 INFO L482 AbstractCegarLoop]: Abstraction has 715 states and 2393 transitions. [2021-06-05 14:35:06,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2393 transitions. [2021-06-05 14:35:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:06,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:06,499 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:06,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2322,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:06,708 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:06,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:06,709 INFO L82 PathProgramCache]: Analyzing trace with hash 796689838, now seen corresponding path program 129 times [2021-06-05 14:35:06,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:06,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378006789] [2021-06-05 14:35:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:06,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:06,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378006789] [2021-06-05 14:35:06,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378006789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:06,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495403012] [2021-06-05 14:35:06,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:06,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:06,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:06,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:06,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:07,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:07,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:07,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:07,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:07,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:07,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:07,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:07,096 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:07,100 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:07,105 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:07,109 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:07,113 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:07,117 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:07,122 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:07,126 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:07,130 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:07,134 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:07,138 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:07,142 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:07,146 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:07,149 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:07,153 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:07,156 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:07,350 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 14:35:07,351 INFO L628 ElimStorePlain]: treesize reduction 64, result has 74.2 percent of original size [2021-06-05 14:35:07,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:07,353 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:927, output treesize:184 [2021-06-05 14:35:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:07,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495403012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:07,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:07,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:07,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152475408] [2021-06-05 14:35:07,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:07,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:07,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:07,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:07,553 INFO L87 Difference]: Start difference. First operand 715 states and 2393 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:08,145 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 14:35:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:08,360 INFO L93 Difference]: Finished difference Result 963 states and 3076 transitions. [2021-06-05 14:35:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:08,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:08,361 INFO L225 Difference]: With dead ends: 963 [2021-06-05 14:35:08,361 INFO L226 Difference]: Without dead ends: 948 [2021-06-05 14:35:08,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 915.9ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-06-05 14:35:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 718. [2021-06-05 14:35:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 3.3584379358437935) internal successors, (2408), 717 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2408 transitions. [2021-06-05 14:35:08,369 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2408 transitions. Word has length 19 [2021-06-05 14:35:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:08,370 INFO L482 AbstractCegarLoop]: Abstraction has 718 states and 2408 transitions. [2021-06-05 14:35:08,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2408 transitions. [2021-06-05 14:35:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:08,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:08,370 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:08,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2340,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:08,571 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:08,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:08,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1873939690, now seen corresponding path program 130 times [2021-06-05 14:35:08,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:08,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271362553] [2021-06-05 14:35:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:08,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:08,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271362553] [2021-06-05 14:35:08,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271362553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:08,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364265776] [2021-06-05 14:35:08,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:08,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:08,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:08,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:08,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:08,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:08,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:08,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:08,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:08,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:08,962 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:08,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:08,970 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:08,974 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:08,978 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:08,982 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:08,986 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:08,990 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:08,994 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:08,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:08,998 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:09,002 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:09,005 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:09,009 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:09,012 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:09,169 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 14:35:09,170 INFO L628 ElimStorePlain]: treesize reduction 68, result has 72.9 percent of original size [2021-06-05 14:35:09,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:09,171 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:731, output treesize:183 [2021-06-05 14:35:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:09,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364265776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:09,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:09,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:09,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436731173] [2021-06-05 14:35:09,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:09,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:09,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:09,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:09,406 INFO L87 Difference]: Start difference. First operand 718 states and 2408 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,016 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 14:35:10,176 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-05 14:35:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:10,337 INFO L93 Difference]: Finished difference Result 930 states and 2995 transitions. [2021-06-05 14:35:10,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:10,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:10,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:10,339 INFO L225 Difference]: With dead ends: 930 [2021-06-05 14:35:10,339 INFO L226 Difference]: Without dead ends: 915 [2021-06-05 14:35:10,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1061.8ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-05 14:35:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 713. [2021-06-05 14:35:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.348314606741573) internal successors, (2384), 712 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2384 transitions. [2021-06-05 14:35:10,347 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2384 transitions. Word has length 19 [2021-06-05 14:35:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:10,347 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2384 transitions. [2021-06-05 14:35:10,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2384 transitions. [2021-06-05 14:35:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:10,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:10,348 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:10,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:10,548 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:10,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1054966886, now seen corresponding path program 131 times [2021-06-05 14:35:10,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:10,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337518080] [2021-06-05 14:35:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:10,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:10,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337518080] [2021-06-05 14:35:10,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337518080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:10,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144715490] [2021-06-05 14:35:10,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:10,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:35:10,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:10,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:10,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:10,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:10,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:10,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:10,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:10,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:10,910 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:10,913 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:10,916 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:10,919 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:10,922 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:10,926 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:10,929 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:10,982 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-05 14:35:10,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:10,983 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:409, output treesize:61 [2021-06-05 14:35:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:11,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144715490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:11,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:11,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:11,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740618190] [2021-06-05 14:35:11,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:11,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:11,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:11,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:11,081 INFO L87 Difference]: Start difference. First operand 713 states and 2384 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:11,496 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-05 14:35:12,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:12,051 INFO L93 Difference]: Finished difference Result 1160 states and 3639 transitions. [2021-06-05 14:35:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:12,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:12,053 INFO L225 Difference]: With dead ends: 1160 [2021-06-05 14:35:12,053 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 14:35:12,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1051.2ms TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:35:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 14:35:12,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 719. [2021-06-05 14:35:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.352367688022284) internal successors, (2407), 718 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2407 transitions. [2021-06-05 14:35:12,062 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2407 transitions. Word has length 19 [2021-06-05 14:35:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:12,062 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2407 transitions. [2021-06-05 14:35:12,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2407 transitions. [2021-06-05 14:35:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:12,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:12,063 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:12,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:12,263 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:12,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1227644308, now seen corresponding path program 132 times [2021-06-05 14:35:12,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:12,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35256063] [2021-06-05 14:35:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:12,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:12,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35256063] [2021-06-05 14:35:12,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35256063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:12,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46428978] [2021-06-05 14:35:12,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:12,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:12,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:12,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:12,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:12,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:12,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:12,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:12,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:12,691 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:12,694 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:12,697 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:12,700 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:12,703 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:12,707 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:12,710 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:12,764 INFO L628 ElimStorePlain]: treesize reduction 56, result has 52.1 percent of original size [2021-06-05 14:35:12,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:12,765 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:436, output treesize:61 [2021-06-05 14:35:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:12,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46428978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:12,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:12,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:12,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315276287] [2021-06-05 14:35:12,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:12,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:12,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:12,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:12,861 INFO L87 Difference]: Start difference. First operand 719 states and 2407 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:13,628 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 14:35:13,959 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-05 14:35:14,112 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-06-05 14:35:14,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:14,142 INFO L93 Difference]: Finished difference Result 1114 states and 3533 transitions. [2021-06-05 14:35:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:14,144 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 14:35:14,144 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 14:35:14,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1323.4ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:35:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 14:35:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 722. [2021-06-05 14:35:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 3.3592233009708736) internal successors, (2422), 721 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2422 transitions. [2021-06-05 14:35:14,153 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2422 transitions. Word has length 19 [2021-06-05 14:35:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:14,153 INFO L482 AbstractCegarLoop]: Abstraction has 722 states and 2422 transitions. [2021-06-05 14:35:14,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2422 transitions. [2021-06-05 14:35:14,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:14,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:14,154 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:14,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:14,355 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash -476243870, now seen corresponding path program 133 times [2021-06-05 14:35:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:14,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328775511] [2021-06-05 14:35:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:14,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:14,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328775511] [2021-06-05 14:35:14,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328775511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:14,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348718285] [2021-06-05 14:35:14,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:14,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:14,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:14,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:14,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:14,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:14,781 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:14,785 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:14,789 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:14,793 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:14,797 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:14,801 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:14,805 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:14,809 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:14,812 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:14,816 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:14,972 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 14:35:14,973 INFO L628 ElimStorePlain]: treesize reduction 68, result has 72.9 percent of original size [2021-06-05 14:35:14,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:14,975 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:559, output treesize:183 [2021-06-05 14:35:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:15,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348718285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:15,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:15,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:15,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655705336] [2021-06-05 14:35:15,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:15,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:15,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:15,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:15,174 INFO L87 Difference]: Start difference. First operand 722 states and 2422 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:15,548 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 14:35:15,826 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 14:35:15,983 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-05 14:35:16,127 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43 [2021-06-05 14:35:16,315 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-06-05 14:35:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:16,326 INFO L93 Difference]: Finished difference Result 1089 states and 3469 transitions. [2021-06-05 14:35:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:16,328 INFO L225 Difference]: With dead ends: 1089 [2021-06-05 14:35:16,328 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 14:35:16,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1298.9ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:16,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 14:35:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 727. [2021-06-05 14:35:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.369146005509642) internal successors, (2446), 726 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2446 transitions. [2021-06-05 14:35:16,338 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2446 transitions. Word has length 19 [2021-06-05 14:35:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:16,338 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2446 transitions. [2021-06-05 14:35:16,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2446 transitions. [2021-06-05 14:35:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:16,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:16,339 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:16,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-06-05 14:35:16,539 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:16,540 INFO L82 PathProgramCache]: Analyzing trace with hash 816098530, now seen corresponding path program 134 times [2021-06-05 14:35:16,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:16,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608767914] [2021-06-05 14:35:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:16,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:16,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608767914] [2021-06-05 14:35:16,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608767914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:16,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137164474] [2021-06-05 14:35:16,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:16,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:16,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:16,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:16,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:16,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:16,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:16,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:16,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:16,941 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:16,945 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:16,949 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:16,953 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:16,957 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:16,961 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:16,965 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:16,969 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:16,973 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:16,977 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:16,982 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:16,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:16,985 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:17,151 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 14:35:17,151 INFO L628 ElimStorePlain]: treesize reduction 178, result has 50.7 percent of original size [2021-06-05 14:35:17,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:17,153 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:183 [2021-06-05 14:35:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:17,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137164474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:17,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:17,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:17,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329374826] [2021-06-05 14:35:17,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:17,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:17,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:17,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:17,389 INFO L87 Difference]: Start difference. First operand 727 states and 2446 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:18,057 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 14:35:18,350 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 14:35:18,612 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 14:35:18,849 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-05 14:35:19,097 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 14:35:19,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:19,159 INFO L93 Difference]: Finished difference Result 1068 states and 3409 transitions. [2021-06-05 14:35:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:19,161 INFO L225 Difference]: With dead ends: 1068 [2021-06-05 14:35:19,161 INFO L226 Difference]: Without dead ends: 1053 [2021-06-05 14:35:19,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1900.2ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:35:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-05 14:35:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 717. [2021-06-05 14:35:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.35195530726257) internal successors, (2400), 716 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2400 transitions. [2021-06-05 14:35:19,173 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2400 transitions. Word has length 19 [2021-06-05 14:35:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:19,173 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 2400 transitions. [2021-06-05 14:35:19,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2400 transitions. [2021-06-05 14:35:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:19,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:19,174 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:19,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2442 [2021-06-05 14:35:19,381 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:19,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1663386532, now seen corresponding path program 135 times [2021-06-05 14:35:19,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:19,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368150887] [2021-06-05 14:35:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:19,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:19,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368150887] [2021-06-05 14:35:19,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368150887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:19,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636519389] [2021-06-05 14:35:19,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:19,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:35:19,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:19,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:19,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:19,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:19,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:19,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:19,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:35:19,737 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:19,740 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:19,776 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 14:35:19,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:19,777 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 14:35:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:19,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636519389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:19,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:19,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:19,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870462307] [2021-06-05 14:35:19,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:19,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:19,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:19,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:19,821 INFO L87 Difference]: Start difference. First operand 717 states and 2400 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:20,254 INFO L93 Difference]: Finished difference Result 894 states and 2875 transitions. [2021-06-05 14:35:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:20,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:20,255 INFO L225 Difference]: With dead ends: 894 [2021-06-05 14:35:20,255 INFO L226 Difference]: Without dead ends: 879 [2021-06-05 14:35:20,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 481.5ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:35:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-06-05 14:35:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 723. [2021-06-05 14:35:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.350415512465374) internal successors, (2419), 722 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2419 transitions. [2021-06-05 14:35:20,263 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2419 transitions. Word has length 19 [2021-06-05 14:35:20,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:20,263 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2419 transitions. [2021-06-05 14:35:20,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:20,263 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2419 transitions. [2021-06-05 14:35:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:20,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:20,264 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:20,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2462,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:20,464 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:20,465 INFO L82 PathProgramCache]: Analyzing trace with hash 222948214, now seen corresponding path program 136 times [2021-06-05 14:35:20,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:20,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813321727] [2021-06-05 14:35:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:20,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:20,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813321727] [2021-06-05 14:35:20,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813321727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:20,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140270542] [2021-06-05 14:35:20,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:20,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:20,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:20,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:35:20,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:20,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:20,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:20,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:20,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:20,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:20,819 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:20,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:20,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:20,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:20,826 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:20,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:20,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:20,833 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:20,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:20,837 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:20,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:20,840 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:20,903 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-06-05 14:35:20,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:20,904 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 14:35:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:21,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140270542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:21,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:21,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:21,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441644853] [2021-06-05 14:35:21,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:21,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:21,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:21,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:21,016 INFO L87 Difference]: Start difference. First operand 723 states and 2419 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:21,585 INFO L93 Difference]: Finished difference Result 901 states and 2877 transitions. [2021-06-05 14:35:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:21,587 INFO L225 Difference]: With dead ends: 901 [2021-06-05 14:35:21,587 INFO L226 Difference]: Without dead ends: 873 [2021-06-05 14:35:21,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 658.4ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:35:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-06-05 14:35:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 726. [2021-06-05 14:35:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.3475862068965516) internal successors, (2427), 725 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2427 transitions. [2021-06-05 14:35:21,594 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2427 transitions. Word has length 19 [2021-06-05 14:35:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:21,594 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2427 transitions. [2021-06-05 14:35:21,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2427 transitions. [2021-06-05 14:35:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:21,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:21,595 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:21,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2472 [2021-06-05 14:35:21,796 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:21,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:21,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1923222546, now seen corresponding path program 137 times [2021-06-05 14:35:21,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:21,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900531545] [2021-06-05 14:35:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:21,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:21,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900531545] [2021-06-05 14:35:21,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900531545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:21,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811480529] [2021-06-05 14:35:21,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:22,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:35:22,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:22,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:22,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:22,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:22,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:22,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:22,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:22,160 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:22,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:22,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:22,221 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.7 percent of original size [2021-06-05 14:35:22,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:22,222 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:238, output treesize:59 [2021-06-05 14:35:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:22,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811480529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:22,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:22,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:22,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643274943] [2021-06-05 14:35:22,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:22,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:22,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:22,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:22,318 INFO L87 Difference]: Start difference. First operand 726 states and 2427 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:23,030 INFO L93 Difference]: Finished difference Result 1058 states and 3256 transitions. [2021-06-05 14:35:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:35:23,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:23,032 INFO L225 Difference]: With dead ends: 1058 [2021-06-05 14:35:23,032 INFO L226 Difference]: Without dead ends: 1000 [2021-06-05 14:35:23,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 699.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:35:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-05 14:35:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 735. [2021-06-05 14:35:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.35149863760218) internal successors, (2460), 734 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2460 transitions. [2021-06-05 14:35:23,041 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2460 transitions. Word has length 19 [2021-06-05 14:35:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:23,041 INFO L482 AbstractCegarLoop]: Abstraction has 735 states and 2460 transitions. [2021-06-05 14:35:23,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2460 transitions. [2021-06-05 14:35:23,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:23,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:23,042 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:23,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2488 [2021-06-05 14:35:23,249 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:23,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:23,250 INFO L82 PathProgramCache]: Analyzing trace with hash -813003666, now seen corresponding path program 138 times [2021-06-05 14:35:23,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:23,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132656526] [2021-06-05 14:35:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:23,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132656526] [2021-06-05 14:35:23,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132656526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206566112] [2021-06-05 14:35:23,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:23,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:35:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:23,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:23,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:23,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:23,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:23,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:23,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:35:23,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:23,664 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:23,700 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 14:35:23,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:23,701 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 14:35:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:23,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206566112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:23,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:23,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:23,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510461270] [2021-06-05 14:35:23,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:23,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:23,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:23,750 INFO L87 Difference]: Start difference. First operand 735 states and 2460 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:24,396 INFO L93 Difference]: Finished difference Result 950 states and 3036 transitions. [2021-06-05 14:35:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:24,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:24,398 INFO L225 Difference]: With dead ends: 950 [2021-06-05 14:35:24,398 INFO L226 Difference]: Without dead ends: 935 [2021-06-05 14:35:24,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 642.7ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-06-05 14:35:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 741. [2021-06-05 14:35:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3594594594594596) internal successors, (2486), 740 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2486 transitions. [2021-06-05 14:35:24,406 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2486 transitions. Word has length 19 [2021-06-05 14:35:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:24,406 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2486 transitions. [2021-06-05 14:35:24,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2486 transitions. [2021-06-05 14:35:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:24,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:24,407 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:24,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2506,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:24,607 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2041525312, now seen corresponding path program 139 times [2021-06-05 14:35:24,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:24,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903135771] [2021-06-05 14:35:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:24,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:24,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903135771] [2021-06-05 14:35:24,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903135771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:24,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136545270] [2021-06-05 14:35:24,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:24,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:35:24,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:25,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:25,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:25,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:25,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:25,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:25,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:25,119 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:25,123 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:25,126 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:25,130 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:25,197 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-06-05 14:35:25,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:25,198 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 14:35:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:25,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136545270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:25,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:25,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:25,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920378743] [2021-06-05 14:35:25,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:25,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:25,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:25,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:25,304 INFO L87 Difference]: Start difference. First operand 741 states and 2486 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:25,900 INFO L93 Difference]: Finished difference Result 952 states and 3034 transitions. [2021-06-05 14:35:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:25,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:25,902 INFO L225 Difference]: With dead ends: 952 [2021-06-05 14:35:25,902 INFO L226 Difference]: Without dead ends: 924 [2021-06-05 14:35:25,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 771.1ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-06-05 14:35:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 738. [2021-06-05 14:35:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.3582089552238807) internal successors, (2475), 737 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2475 transitions. [2021-06-05 14:35:25,910 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2475 transitions. Word has length 19 [2021-06-05 14:35:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:25,910 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2475 transitions. [2021-06-05 14:35:25,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2475 transitions. [2021-06-05 14:35:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:25,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:25,911 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:26,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2516 [2021-06-05 14:35:26,112 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:26,112 INFO L82 PathProgramCache]: Analyzing trace with hash 369762414, now seen corresponding path program 140 times [2021-06-05 14:35:26,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:26,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182918256] [2021-06-05 14:35:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:26,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:26,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182918256] [2021-06-05 14:35:26,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182918256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:26,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250661978] [2021-06-05 14:35:26,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:26,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:26,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:26,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:26,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:26,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:26,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:35:26,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:26,517 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:26,521 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:26,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:26,528 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:26,531 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:26,535 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:35:26,538 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:26,542 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:26,638 INFO L628 ElimStorePlain]: treesize reduction 105, result has 45.9 percent of original size [2021-06-05 14:35:26,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:35:26,639 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:328, output treesize:89 [2021-06-05 14:35:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:26,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250661978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:26,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:26,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:26,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727180839] [2021-06-05 14:35:26,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:26,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:26,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:26,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:26,744 INFO L87 Difference]: Start difference. First operand 738 states and 2475 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:27,368 INFO L93 Difference]: Finished difference Result 1001 states and 3153 transitions. [2021-06-05 14:35:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:27,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:27,370 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 14:35:27,370 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 14:35:27,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:35:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 14:35:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 740. [2021-06-05 14:35:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.3612990527740187) internal successors, (2484), 739 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2484 transitions. [2021-06-05 14:35:27,379 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2484 transitions. Word has length 19 [2021-06-05 14:35:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:27,379 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2484 transitions. [2021-06-05 14:35:27,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2484 transitions. [2021-06-05 14:35:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:27,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:27,380 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:27,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2532,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:27,580 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1587374542, now seen corresponding path program 141 times [2021-06-05 14:35:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:27,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800263919] [2021-06-05 14:35:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:27,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:27,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800263919] [2021-06-05 14:35:27,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800263919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:27,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832311358] [2021-06-05 14:35:27,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:27,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:35:27,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:27,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:27,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:27,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:27,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:27,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:27,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:35:27,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:27,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:27,999 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:28,003 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:28,007 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:28,010 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:35:28,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:28,017 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:28,021 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:28,103 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-06-05 14:35:28,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:35:28,104 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-06-05 14:35:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:28,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832311358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:28,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:28,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:28,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292267647] [2021-06-05 14:35:28,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:28,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:28,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:28,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:28,209 INFO L87 Difference]: Start difference. First operand 740 states and 2484 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:28,667 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-05 14:35:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:28,970 INFO L93 Difference]: Finished difference Result 948 states and 3036 transitions. [2021-06-05 14:35:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:28,972 INFO L225 Difference]: With dead ends: 948 [2021-06-05 14:35:28,972 INFO L226 Difference]: Without dead ends: 933 [2021-06-05 14:35:28,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 836.1ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:35:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-06-05 14:35:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 736. [2021-06-05 14:35:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.3551020408163263) internal successors, (2466), 735 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2466 transitions. [2021-06-05 14:35:28,980 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2466 transitions. Word has length 19 [2021-06-05 14:35:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:28,980 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2466 transitions. [2021-06-05 14:35:28,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2466 transitions. [2021-06-05 14:35:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:28,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:28,981 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:29,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2551 [2021-06-05 14:35:29,181 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1949139886, now seen corresponding path program 142 times [2021-06-05 14:35:29,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:29,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693178905] [2021-06-05 14:35:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:29,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:29,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693178905] [2021-06-05 14:35:29,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693178905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:29,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718885988] [2021-06-05 14:35:29,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:29,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:29,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:29,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:35:29,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:29,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:29,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:29,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:29,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:29,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:29,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:29,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:29,605 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:29,610 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:29,615 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:29,619 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:29,630 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:29,636 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:29,640 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:29,644 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:29,648 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:29,653 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:29,657 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:29,661 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:29,677 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:29,683 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:29,687 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:29,691 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:29,695 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:29,699 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:29,914 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-05 14:35:29,914 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-06-05 14:35:29,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:35:29,917 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-06-05 14:35:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:30,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718885988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:30,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:30,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:30,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478374620] [2021-06-05 14:35:30,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:30,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:30,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:30,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:30,145 INFO L87 Difference]: Start difference. First operand 736 states and 2466 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,594 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 14:35:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:30,948 INFO L93 Difference]: Finished difference Result 1117 states and 3435 transitions. [2021-06-05 14:35:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:30,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:30,950 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 14:35:30,950 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 14:35:30,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 983.8ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:35:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 14:35:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 742. [2021-06-05 14:35:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3684210526315788) internal successors, (2496), 741 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2496 transitions. [2021-06-05 14:35:30,959 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2496 transitions. Word has length 19 [2021-06-05 14:35:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:30,959 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2496 transitions. [2021-06-05 14:35:30,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2496 transitions. [2021-06-05 14:35:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:30,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:30,960 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:31,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2567 [2021-06-05 14:35:31,161 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:31,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1053485010, now seen corresponding path program 143 times [2021-06-05 14:35:31,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:31,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823382483] [2021-06-05 14:35:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:31,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:31,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823382483] [2021-06-05 14:35:31,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823382483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:31,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042667953] [2021-06-05 14:35:31,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:31,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:31,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:31,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:31,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:31,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:31,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:31,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:31,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:31,549 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:31,554 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:31,559 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:31,563 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:31,567 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:31,572 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:31,577 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:31,581 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:31,585 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:31,590 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:31,594 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:31,598 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:31,602 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:31,606 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:31,610 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:31,614 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:31,618 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:31,622 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:31,626 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:31,630 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:31,808 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:35:31,808 INFO L628 ElimStorePlain]: treesize reduction 208, result has 46.8 percent of original size [2021-06-05 14:35:31,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:31,810 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:991, output treesize:183 [2021-06-05 14:35:31,977 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 14:35:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:32,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042667953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:32,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:32,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:32,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656885887] [2021-06-05 14:35:32,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:32,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:32,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:32,155 INFO L87 Difference]: Start difference. First operand 742 states and 2496 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:32,782 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 14:35:32,950 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 14:35:33,111 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-05 14:35:33,243 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-06-05 14:35:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:33,289 INFO L93 Difference]: Finished difference Result 987 states and 3121 transitions. [2021-06-05 14:35:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:35:33,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:33,291 INFO L225 Difference]: With dead ends: 987 [2021-06-05 14:35:33,291 INFO L226 Difference]: Without dead ends: 972 [2021-06-05 14:35:33,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1329.5ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:35:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-05 14:35:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 740. [2021-06-05 14:35:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.365358592692828) internal successors, (2487), 739 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2487 transitions. [2021-06-05 14:35:33,299 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2487 transitions. Word has length 19 [2021-06-05 14:35:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:33,299 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2487 transitions. [2021-06-05 14:35:33,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2487 transitions. [2021-06-05 14:35:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:33,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:33,300 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:33,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-06-05 14:35:33,501 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash -492203456, now seen corresponding path program 144 times [2021-06-05 14:35:33,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:33,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912689184] [2021-06-05 14:35:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:33,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:33,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912689184] [2021-06-05 14:35:33,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912689184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:33,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337260650] [2021-06-05 14:35:33,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:33,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:33,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:33,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:33,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:33,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:33,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:33,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:33,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:33,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:33,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:33,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:33,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:33,959 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:33,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:33,963 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:33,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:33,966 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:33,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:33,969 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:34,024 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-06-05 14:35:34,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:34,025 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:279, output treesize:61 [2021-06-05 14:35:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:34,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337260650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:34,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:34,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:35:34,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061248542] [2021-06-05 14:35:34,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:35:34,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:34,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:35:34,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:35:34,126 INFO L87 Difference]: Start difference. First operand 740 states and 2487 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:34,733 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-05 14:35:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:34,828 INFO L93 Difference]: Finished difference Result 1046 states and 3281 transitions. [2021-06-05 14:35:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:34,830 INFO L225 Difference]: With dead ends: 1046 [2021-06-05 14:35:34,830 INFO L226 Difference]: Without dead ends: 1031 [2021-06-05 14:35:34,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 792.3ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-05 14:35:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 743. [2021-06-05 14:35:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.371967654986523) internal successors, (2502), 742 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:34,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2502 transitions. [2021-06-05 14:35:34,839 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2502 transitions. Word has length 19 [2021-06-05 14:35:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:34,839 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2502 transitions. [2021-06-05 14:35:34,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:34,839 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2502 transitions. [2021-06-05 14:35:34,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:34,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:34,840 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:35,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2608,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:35,040 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:35,041 INFO L82 PathProgramCache]: Analyzing trace with hash 259196982, now seen corresponding path program 145 times [2021-06-05 14:35:35,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:35,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836060921] [2021-06-05 14:35:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:35,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:35,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836060921] [2021-06-05 14:35:35,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836060921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:35,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331590093] [2021-06-05 14:35:35,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:35,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:35,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:35,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:35,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:35,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:35,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:35,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:35,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:35,491 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:35,496 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:35,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:35,505 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:35,509 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:35,513 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:35,517 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:35,521 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:35,525 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:35,538 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:35,542 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:35,546 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:35,549 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:35,553 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:35,557 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:35,561 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:35,564 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:35,736 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:35:35,736 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-05 14:35:35,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:35,738 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-05 14:35:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:35,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331590093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:35,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:35,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:35,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558046107] [2021-06-05 14:35:35,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:35,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:35,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:35,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:35,965 INFO L87 Difference]: Start difference. First operand 743 states and 2502 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:36,871 INFO L93 Difference]: Finished difference Result 1255 states and 3870 transitions. [2021-06-05 14:35:36,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:35:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:36,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:36,873 INFO L225 Difference]: With dead ends: 1255 [2021-06-05 14:35:36,873 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 14:35:36,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 965.0ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:35:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 14:35:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 750. [2021-06-05 14:35:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.391188251001335) internal successors, (2540), 749 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2540 transitions. [2021-06-05 14:35:36,885 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2540 transitions. Word has length 19 [2021-06-05 14:35:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:36,885 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2540 transitions. [2021-06-05 14:35:36,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2540 transitions. [2021-06-05 14:35:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:36,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:36,886 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:37,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2625 [2021-06-05 14:35:37,086 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1883534750, now seen corresponding path program 146 times [2021-06-05 14:35:37,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:37,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261349073] [2021-06-05 14:35:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:37,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:37,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261349073] [2021-06-05 14:35:37,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261349073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:37,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910816266] [2021-06-05 14:35:37,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:37,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:37,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:37,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:37,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:37,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:37,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:37,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:37,435 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:37,439 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:37,444 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:37,448 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:37,453 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:37,457 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:37,467 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:37,471 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:37,475 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:37,479 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:37,484 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:37,487 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:37,491 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:37,495 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:37,499 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:37,503 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:37,507 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:37,510 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:37,670 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:35:37,670 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-05 14:35:37,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:37,672 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-05 14:35:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:37,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910816266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:37,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:37,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:37,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410977424] [2021-06-05 14:35:37,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:37,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:37,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:37,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:37,899 INFO L87 Difference]: Start difference. First operand 750 states and 2540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:38,472 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 14:35:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:38,633 INFO L93 Difference]: Finished difference Result 1001 states and 3185 transitions. [2021-06-05 14:35:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:38,634 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 14:35:38,635 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 14:35:38,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 839.5ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:38,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 14:35:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 744. [2021-06-05 14:35:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.3781965006729475) internal successors, (2510), 743 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2510 transitions. [2021-06-05 14:35:38,644 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2510 transitions. Word has length 19 [2021-06-05 14:35:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:38,644 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 2510 transitions. [2021-06-05 14:35:38,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2510 transitions. [2021-06-05 14:35:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:38,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:38,645 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:38,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2644,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:38,846 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:38,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2085937374, now seen corresponding path program 147 times [2021-06-05 14:35:38,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:38,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759110654] [2021-06-05 14:35:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:39,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:39,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759110654] [2021-06-05 14:35:39,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759110654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:39,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035181752] [2021-06-05 14:35:39,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:39,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:35:39,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:39,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:39,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:39,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:39,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:39,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:39,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:35:39,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:39,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:39,374 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-06-05 14:35:39,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:39,374 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-06-05 14:35:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:39,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035181752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:39,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:39,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:39,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343727825] [2021-06-05 14:35:39,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:39,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:39,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:39,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:39,425 INFO L87 Difference]: Start difference. First operand 744 states and 2510 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:39,819 INFO L93 Difference]: Finished difference Result 1000 states and 3206 transitions. [2021-06-05 14:35:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:39,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:39,821 INFO L225 Difference]: With dead ends: 1000 [2021-06-05 14:35:39,821 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 14:35:39,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 14:35:39,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 753. [2021-06-05 14:35:39,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3882978723404253) internal successors, (2548), 752 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:39,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2548 transitions. [2021-06-05 14:35:39,829 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2548 transitions. Word has length 19 [2021-06-05 14:35:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:39,829 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2548 transitions. [2021-06-05 14:35:39,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2548 transitions. [2021-06-05 14:35:39,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:39,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:39,830 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:40,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2667 [2021-06-05 14:35:40,031 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:40,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:40,031 INFO L82 PathProgramCache]: Analyzing trace with hash 768591604, now seen corresponding path program 148 times [2021-06-05 14:35:40,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:40,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63864719] [2021-06-05 14:35:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:40,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:40,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63864719] [2021-06-05 14:35:40,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63864719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:40,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781257317] [2021-06-05 14:35:40,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:40,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:40,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:40,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:35:40,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:40,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:40,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:40,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:40,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:40,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:40,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:40,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:40,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:40,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:40,491 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:40,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:40,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:40,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:40,498 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:40,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:40,502 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:40,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:40,505 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:40,567 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-06-05 14:35:40,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:40,568 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 14:35:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:40,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781257317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:40,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:40,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247105903] [2021-06-05 14:35:40,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:40,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:40,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:40,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:40,669 INFO L87 Difference]: Start difference. First operand 753 states and 2548 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:41,218 INFO L93 Difference]: Finished difference Result 1016 states and 3241 transitions. [2021-06-05 14:35:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:35:41,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:41,219 INFO L225 Difference]: With dead ends: 1016 [2021-06-05 14:35:41,219 INFO L226 Difference]: Without dead ends: 988 [2021-06-05 14:35:41,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 670.0ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:35:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-06-05 14:35:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 750. [2021-06-05 14:35:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3871829105473967) internal successors, (2537), 749 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2537 transitions. [2021-06-05 14:35:41,230 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2537 transitions. Word has length 19 [2021-06-05 14:35:41,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:41,230 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2537 transitions. [2021-06-05 14:35:41,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2537 transitions. [2021-06-05 14:35:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:41,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:41,231 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:41,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2677 [2021-06-05 14:35:41,432 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:41,432 INFO L82 PathProgramCache]: Analyzing trace with hash -903171294, now seen corresponding path program 149 times [2021-06-05 14:35:41,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:41,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305341992] [2021-06-05 14:35:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:41,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:41,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305341992] [2021-06-05 14:35:41,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305341992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:41,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263667914] [2021-06-05 14:35:41,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:41,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:41,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:41,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:41,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:41,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:35:41,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:41,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:41,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:41,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:41,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:41,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:41,896 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:41,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:41,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:41,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:41,902 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:41,949 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-06-05 14:35:41,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:41,950 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-06-05 14:35:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:42,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263667914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:42,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:42,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:42,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703860488] [2021-06-05 14:35:42,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:42,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:42,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:42,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:42,035 INFO L87 Difference]: Start difference. First operand 750 states and 2537 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:42,442 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-05 14:35:42,615 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-06-05 14:35:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:42,830 INFO L93 Difference]: Finished difference Result 1140 states and 3561 transitions. [2021-06-05 14:35:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:35:42,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:42,832 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 14:35:42,832 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 14:35:42,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 850.1ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:35:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 14:35:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 752. [2021-06-05 14:35:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.3901464713715046) internal successors, (2546), 751 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2546 transitions. [2021-06-05 14:35:42,841 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2546 transitions. Word has length 19 [2021-06-05 14:35:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:42,841 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 2546 transitions. [2021-06-05 14:35:42,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2546 transitions. [2021-06-05 14:35:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:42,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:42,842 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:43,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-06-05 14:35:43,042 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:43,042 INFO L82 PathProgramCache]: Analyzing trace with hash 676206178, now seen corresponding path program 150 times [2021-06-05 14:35:43,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:43,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279076239] [2021-06-05 14:35:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:43,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:43,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279076239] [2021-06-05 14:35:43,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279076239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:43,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058806671] [2021-06-05 14:35:43,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:43,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:35:43,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:43,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:43,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:43,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:43,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:43,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:43,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:43,460 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:43,464 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:43,468 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:43,472 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:43,476 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:43,480 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:43,483 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:43,487 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:43,491 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:43,495 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:43,499 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:43,502 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:43,657 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 14:35:43,657 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.3 percent of original size [2021-06-05 14:35:43,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:43,659 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-06-05 14:35:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:43,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058806671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:43,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:43,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:43,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669384427] [2021-06-05 14:35:43,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:43,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:43,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:43,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:43,856 INFO L87 Difference]: Start difference. First operand 752 states and 2546 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:44,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:44,303 INFO L93 Difference]: Finished difference Result 1055 states and 3350 transitions. [2021-06-05 14:35:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:44,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:44,305 INFO L225 Difference]: With dead ends: 1055 [2021-06-05 14:35:44,305 INFO L226 Difference]: Without dead ends: 1040 [2021-06-05 14:35:44,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-06-05 14:35:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 753. [2021-06-05 14:35:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.393617021276596) internal successors, (2552), 752 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:44,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2552 transitions. [2021-06-05 14:35:44,314 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2552 transitions. Word has length 19 [2021-06-05 14:35:44,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:44,314 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2552 transitions. [2021-06-05 14:35:44,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2552 transitions. [2021-06-05 14:35:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:44,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:44,315 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:44,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2712 [2021-06-05 14:35:44,516 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:44,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:44,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1968548578, now seen corresponding path program 151 times [2021-06-05 14:35:44,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:44,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840418733] [2021-06-05 14:35:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:44,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:44,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840418733] [2021-06-05 14:35:44,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840418733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:44,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067051654] [2021-06-05 14:35:44,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:44,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:35:44,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:44,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:44,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:44,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:44,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:44,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:44,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:44,917 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:44,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:44,925 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:44,929 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:44,933 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:44,937 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:44,941 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:44,944 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:44,948 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:44,952 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:44,956 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:44,960 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:44,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:44,963 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:45,166 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-05 14:35:45,166 INFO L628 ElimStorePlain]: treesize reduction 66, result has 77.1 percent of original size [2021-06-05 14:35:45,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:35:45,168 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-06-05 14:35:45,292 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 14:35:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:45,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067051654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:45,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:45,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:45,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116414186] [2021-06-05 14:35:45,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:45,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:45,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:45,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:45,478 INFO L87 Difference]: Start difference. First operand 753 states and 2552 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:46,067 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 14:35:46,268 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 14:35:46,396 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-06-05 14:35:46,580 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-05 14:35:46,754 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 14:35:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:46,850 INFO L93 Difference]: Finished difference Result 1126 states and 3545 transitions. [2021-06-05 14:35:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:35:46,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:46,852 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 14:35:46,852 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 14:35:46,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1571.1ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:35:46,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 14:35:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 750. [2021-06-05 14:35:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3871829105473967) internal successors, (2537), 749 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2537 transitions. [2021-06-05 14:35:46,861 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2537 transitions. Word has length 19 [2021-06-05 14:35:46,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:46,861 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2537 transitions. [2021-06-05 14:35:46,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2537 transitions. [2021-06-05 14:35:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:46,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:46,862 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:47,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2732,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:47,063 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1242772622, now seen corresponding path program 152 times [2021-06-05 14:35:47,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:47,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935087266] [2021-06-05 14:35:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:47,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935087266] [2021-06-05 14:35:47,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935087266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605438214] [2021-06-05 14:35:47,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:47,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:47,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:35:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:47,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:47,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:47,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:47,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:47,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:47,444 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:47,447 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:47,450 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:47,516 INFO L628 ElimStorePlain]: treesize reduction 24, result has 77.6 percent of original size [2021-06-05 14:35:47,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:35:47,517 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:222, output treesize:83 [2021-06-05 14:35:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:47,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605438214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:47,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:47,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:47,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568995454] [2021-06-05 14:35:47,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:47,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:47,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:47,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:47,704 INFO L87 Difference]: Start difference. First operand 750 states and 2537 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:48,248 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-06-05 14:35:48,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:48,506 INFO L93 Difference]: Finished difference Result 1129 states and 3638 transitions. [2021-06-05 14:35:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:48,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:48,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:48,508 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 14:35:48,508 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 14:35:48,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 879.3ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:35:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 14:35:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 756. [2021-06-05 14:35:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.394701986754967) internal successors, (2563), 755 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2563 transitions. [2021-06-05 14:35:48,518 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2563 transitions. Word has length 19 [2021-06-05 14:35:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:48,518 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2563 transitions. [2021-06-05 14:35:48,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2563 transitions. [2021-06-05 14:35:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:48,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:48,519 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:48,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2754,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:48,719 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:48,720 INFO L82 PathProgramCache]: Analyzing trace with hash 746316214, now seen corresponding path program 153 times [2021-06-05 14:35:48,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:48,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066568398] [2021-06-05 14:35:48,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:48,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:48,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066568398] [2021-06-05 14:35:48,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066568398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:48,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019212899] [2021-06-05 14:35:48,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:48,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:35:48,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:48,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:49,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:49,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:49,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:49,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:49,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:49,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:49,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:49,062 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:49,065 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:49,068 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:49,071 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:49,074 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:49,156 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-06-05 14:35:49,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:35:49,157 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-05 14:35:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:49,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019212899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:49,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:49,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:49,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719063539] [2021-06-05 14:35:49,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:49,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:49,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:49,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:49,388 INFO L87 Difference]: Start difference. First operand 756 states and 2563 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:49,806 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 14:35:49,958 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-05 14:35:50,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:50,272 INFO L93 Difference]: Finished difference Result 1121 states and 3549 transitions. [2021-06-05 14:35:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:35:50,273 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:50,274 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 14:35:50,274 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 14:35:50,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 918.1ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 14:35:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 764. [2021-06-05 14:35:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.403669724770642) internal successors, (2597), 763 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2597 transitions. [2021-06-05 14:35:50,284 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2597 transitions. Word has length 19 [2021-06-05 14:35:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:50,284 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2597 transitions. [2021-06-05 14:35:50,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2597 transitions. [2021-06-05 14:35:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:50,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:50,285 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:50,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2772 [2021-06-05 14:35:50,486 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2038658614, now seen corresponding path program 154 times [2021-06-05 14:35:50,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:50,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044911771] [2021-06-05 14:35:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:50,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:50,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044911771] [2021-06-05 14:35:50,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044911771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:50,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452711352] [2021-06-05 14:35:50,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:50,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:35:50,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:50,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:50,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:50,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:50,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:50,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:50,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:50,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:50,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:50,793 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:50,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:50,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:50,803 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:50,806 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:50,809 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:50,891 INFO L628 ElimStorePlain]: treesize reduction 53, result has 64.4 percent of original size [2021-06-05 14:35:50,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:35:50,893 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-05 14:35:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:51,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452711352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:51,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:51,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:51,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147082150] [2021-06-05 14:35:51,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:51,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:51,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:51,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:51,169 INFO L87 Difference]: Start difference. First operand 764 states and 2597 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:51,550 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-05 14:35:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:51,680 INFO L93 Difference]: Finished difference Result 1126 states and 3542 transitions. [2021-06-05 14:35:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:51,682 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 14:35:51,682 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 14:35:51,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 630.7ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:35:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 14:35:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 763. [2021-06-05 14:35:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.400262467191601) internal successors, (2591), 762 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2591 transitions. [2021-06-05 14:35:51,692 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2591 transitions. Word has length 19 [2021-06-05 14:35:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:51,692 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 2591 transitions. [2021-06-05 14:35:51,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2591 transitions. [2021-06-05 14:35:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:51,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:51,693 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:51,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2788,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:51,894 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2079330760, now seen corresponding path program 155 times [2021-06-05 14:35:51,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:51,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753278351] [2021-06-05 14:35:51,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:52,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:52,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753278351] [2021-06-05 14:35:52,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753278351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:52,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481197864] [2021-06-05 14:35:52,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:52,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:52,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:52,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:52,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:35:52,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:52,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:52,195 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:52,199 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:52,202 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:52,206 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:52,209 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:52,212 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:52,216 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:52,219 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:52,305 INFO L628 ElimStorePlain]: treesize reduction 64, result has 61.7 percent of original size [2021-06-05 14:35:52,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:35:52,307 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:400, output treesize:103 [2021-06-05 14:35:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:52,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481197864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:52,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:52,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:35:52,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947239987] [2021-06-05 14:35:52,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:35:52,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:52,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:35:52,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:35:52,502 INFO L87 Difference]: Start difference. First operand 763 states and 2591 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:53,131 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:35:53,319 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-06-05 14:35:53,532 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-05 14:35:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:53,730 INFO L93 Difference]: Finished difference Result 1287 states and 3917 transitions. [2021-06-05 14:35:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:35:53,731 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:53,732 INFO L225 Difference]: With dead ends: 1287 [2021-06-05 14:35:53,733 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 14:35:53,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1233.9ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:35:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 14:35:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 754. [2021-06-05 14:35:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3891102257636123) internal successors, (2552), 753 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2552 transitions. [2021-06-05 14:35:53,745 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2552 transitions. Word has length 19 [2021-06-05 14:35:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:53,745 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2552 transitions. [2021-06-05 14:35:53,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2552 transitions. [2021-06-05 14:35:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:53,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:53,746 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:53,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2811 [2021-06-05 14:35:53,946 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:53,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:53,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1316107356, now seen corresponding path program 156 times [2021-06-05 14:35:53,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:53,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963476378] [2021-06-05 14:35:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:54,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:54,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963476378] [2021-06-05 14:35:54,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963476378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:54,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775881945] [2021-06-05 14:35:54,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:54,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:35:54,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:54,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:54,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:54,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:54,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:54,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:54,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:54,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:54,276 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:54,279 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:54,282 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:54,285 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:54,289 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:54,373 INFO L628 ElimStorePlain]: treesize reduction 42, result has 71.2 percent of original size [2021-06-05 14:35:54,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:35:54,374 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:104 [2021-06-05 14:35:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:54,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775881945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:54,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:54,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868337007] [2021-06-05 14:35:54,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:54,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:54,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:54,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:54,636 INFO L87 Difference]: Start difference. First operand 754 states and 2552 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:54,981 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 14:35:55,147 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 14:35:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:55,273 INFO L93 Difference]: Finished difference Result 1104 states and 3478 transitions. [2021-06-05 14:35:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:35:55,273 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:55,275 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 14:35:55,275 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 14:35:55,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 764.4ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:35:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 14:35:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 750. [2021-06-05 14:35:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3858477970627505) internal successors, (2536), 749 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2536 transitions. [2021-06-05 14:35:55,284 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2536 transitions. Word has length 19 [2021-06-05 14:35:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:55,284 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2536 transitions. [2021-06-05 14:35:55,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2536 transitions. [2021-06-05 14:35:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:55,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:55,285 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:55,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2832 [2021-06-05 14:35:55,485 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:55,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1681207660, now seen corresponding path program 157 times [2021-06-05 14:35:55,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:55,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927921839] [2021-06-05 14:35:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:55,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927921839] [2021-06-05 14:35:55,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927921839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660542612] [2021-06-05 14:35:55,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:55,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:55,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:55,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:55,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:55,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:55,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:55,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:55,857 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:55,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:55,863 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:55,867 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:55,870 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:55,873 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:55,876 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:55,879 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:55,882 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:55,931 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-06-05 14:35:55,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:35:55,932 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:486, output treesize:61 [2021-06-05 14:35:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:56,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660542612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:56,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:56,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:56,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717330699] [2021-06-05 14:35:56,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:56,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:56,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:56,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:56,025 INFO L87 Difference]: Start difference. First operand 750 states and 2536 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:56,667 INFO L93 Difference]: Finished difference Result 1067 states and 3396 transitions. [2021-06-05 14:35:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:35:56,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:56,668 INFO L225 Difference]: With dead ends: 1067 [2021-06-05 14:35:56,668 INFO L226 Difference]: Without dead ends: 1052 [2021-06-05 14:35:56,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 672.0ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:35:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-06-05 14:35:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 756. [2021-06-05 14:35:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.394701986754967) internal successors, (2563), 755 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2563 transitions. [2021-06-05 14:35:56,677 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2563 transitions. Word has length 19 [2021-06-05 14:35:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:56,677 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2563 transitions. [2021-06-05 14:35:56,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:56,678 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2563 transitions. [2021-06-05 14:35:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:56,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:56,678 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:56,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2853 [2021-06-05 14:35:56,880 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:56,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1862359198, now seen corresponding path program 158 times [2021-06-05 14:35:56,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:56,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725261304] [2021-06-05 14:35:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:57,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:57,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725261304] [2021-06-05 14:35:57,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725261304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:57,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314623284] [2021-06-05 14:35:57,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:57,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:35:57,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:57,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:57,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:57,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:57,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:57,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:57,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:57,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:57,267 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:57,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:57,277 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:57,282 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:57,287 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:57,291 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:57,296 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:35:57,301 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:57,306 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:35:57,311 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:57,315 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:57,319 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:57,502 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 14:35:57,502 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 14:35:57,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:57,505 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 14:35:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:57,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314623284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:57,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:57,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:57,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132478853] [2021-06-05 14:35:57,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:57,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:57,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:57,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:57,731 INFO L87 Difference]: Start difference. First operand 756 states and 2563 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:35:58,415 INFO L93 Difference]: Finished difference Result 1104 states and 3486 transitions. [2021-06-05 14:35:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:35:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:35:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:35:58,417 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 14:35:58,417 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 14:35:58,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 811.3ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:35:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 14:35:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 759. [2021-06-05 14:35:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.401055408970976) internal successors, (2578), 758 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2578 transitions. [2021-06-05 14:35:58,434 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2578 transitions. Word has length 19 [2021-06-05 14:35:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:35:58,435 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2578 transitions. [2021-06-05 14:35:58,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:35:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2578 transitions. [2021-06-05 14:35:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:35:58,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:35:58,436 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:35:58,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:58,637 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:35:58,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:35:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash -238021430, now seen corresponding path program 159 times [2021-06-05 14:35:58,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:35:58,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933977790] [2021-06-05 14:35:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:35:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:35:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:58,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:35:58,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933977790] [2021-06-05 14:35:58,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933977790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:58,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227653095] [2021-06-05 14:35:58,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:35:58,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:35:58,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:35:58,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:35:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:35:59,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:59,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:59,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:59,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:59,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:59,117 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:59,121 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:59,125 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:59,129 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:59,133 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:35:59,137 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:59,141 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:59,145 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:35:59,149 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:59,152 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:35:59,156 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:35:59,160 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:35:59,320 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:35:59,320 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 14:35:59,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:35:59,322 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-05 14:35:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:35:59,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227653095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:35:59,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:35:59,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:35:59,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862631421] [2021-06-05 14:35:59,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:35:59,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:35:59,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:35:59,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:35:59,594 INFO L87 Difference]: Start difference. First operand 759 states and 2578 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:00,238 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 14:36:00,397 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 14:36:00,543 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-05 14:36:00,765 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 14:36:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:00,957 INFO L93 Difference]: Finished difference Result 1101 states and 3482 transitions. [2021-06-05 14:36:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:36:00,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:00,959 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 14:36:00,959 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 14:36:00,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1537.9ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:36:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 14:36:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 753. [2021-06-05 14:36:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3882978723404253) internal successors, (2548), 752 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2548 transitions. [2021-06-05 14:36:00,968 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2548 transitions. Word has length 19 [2021-06-05 14:36:00,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:00,969 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2548 transitions. [2021-06-05 14:36:00,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2548 transitions. [2021-06-05 14:36:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:00,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:00,969 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:01,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2894 [2021-06-05 14:36:01,170 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:01,170 INFO L82 PathProgramCache]: Analyzing trace with hash -102306258, now seen corresponding path program 160 times [2021-06-05 14:36:01,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:01,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026782921] [2021-06-05 14:36:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:01,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:01,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026782921] [2021-06-05 14:36:01,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026782921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:01,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869090917] [2021-06-05 14:36:01,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:01,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:01,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:01,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:01,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:01,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:01,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:01,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:01,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:01,630 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:01,635 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:01,639 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:01,643 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:01,647 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:01,651 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:01,654 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:01,754 INFO L628 ElimStorePlain]: treesize reduction 42, result has 71.2 percent of original size [2021-06-05 14:36:01,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:01,755 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:104 [2021-06-05 14:36:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:02,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869090917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:02,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:02,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:02,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141835044] [2021-06-05 14:36:02,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:02,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:02,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:02,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:02,007 INFO L87 Difference]: Start difference. First operand 753 states and 2548 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:02,347 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-05 14:36:02,571 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 14:36:02,844 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-06-05 14:36:02,993 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-05 14:36:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:03,004 INFO L93 Difference]: Finished difference Result 1117 states and 3560 transitions. [2021-06-05 14:36:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:36:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:03,006 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 14:36:03,006 INFO L226 Difference]: Without dead ends: 1102 [2021-06-05 14:36:03,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1243.8ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:36:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-06-05 14:36:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 759. [2021-06-05 14:36:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.3970976253298155) internal successors, (2575), 758 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2575 transitions. [2021-06-05 14:36:03,015 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2575 transitions. Word has length 19 [2021-06-05 14:36:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:03,015 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2575 transitions. [2021-06-05 14:36:03,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2575 transitions. [2021-06-05 14:36:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:03,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:03,016 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:03,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:03,216 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:03,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1522031510, now seen corresponding path program 161 times [2021-06-05 14:36:03,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:03,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669801943] [2021-06-05 14:36:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:03,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:03,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669801943] [2021-06-05 14:36:03,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669801943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:03,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150253351] [2021-06-05 14:36:03,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:03,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:03,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:03,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:03,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:03,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:03,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:03,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:03,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:03,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:03,617 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:03,621 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:03,624 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:03,627 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:03,630 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:03,714 INFO L628 ElimStorePlain]: treesize reduction 52, result has 66.7 percent of original size [2021-06-05 14:36:03,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:03,715 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:338, output treesize:104 [2021-06-05 14:36:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:03,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150253351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:03,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:03,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:03,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888279398] [2021-06-05 14:36:03,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:03,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:03,995 INFO L87 Difference]: Start difference. First operand 759 states and 2575 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,366 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-05 14:36:04,517 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-05 14:36:04,660 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 14:36:04,819 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 14:36:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:04,857 INFO L93 Difference]: Finished difference Result 1130 states and 3590 transitions. [2021-06-05 14:36:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:36:04,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:04,859 INFO L225 Difference]: With dead ends: 1130 [2021-06-05 14:36:04,859 INFO L226 Difference]: Without dead ends: 1115 [2021-06-05 14:36:04,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1047.6ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:36:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-05 14:36:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 754. [2021-06-05 14:36:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3904382470119523) internal successors, (2553), 753 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2553 transitions. [2021-06-05 14:36:04,868 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2553 transitions. Word has length 19 [2021-06-05 14:36:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:04,868 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2553 transitions. [2021-06-05 14:36:04,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2553 transitions. [2021-06-05 14:36:04,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:04,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:04,869 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:05,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2933,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:05,069 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1732699988, now seen corresponding path program 162 times [2021-06-05 14:36:05,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:05,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405368768] [2021-06-05 14:36:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:05,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:05,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405368768] [2021-06-05 14:36:05,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405368768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:05,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594662135] [2021-06-05 14:36:05,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:05,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:05,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:05,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:05,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:05,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:05,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:05,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:05,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:05,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:05,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:05,409 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:05,412 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:05,416 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:05,418 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:05,421 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:05,424 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:05,505 INFO L628 ElimStorePlain]: treesize reduction 8, result has 92.5 percent of original size [2021-06-05 14:36:05,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:05,506 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:352, output treesize:99 [2021-06-05 14:36:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:05,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594662135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:05,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:05,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:05,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176957088] [2021-06-05 14:36:05,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:05,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:05,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:05,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:05,758 INFO L87 Difference]: Start difference. First operand 754 states and 2553 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:06,247 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 14:36:06,617 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-05 14:36:06,740 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-06-05 14:36:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:07,102 INFO L93 Difference]: Finished difference Result 1138 states and 3632 transitions. [2021-06-05 14:36:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:36:07,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:07,104 INFO L225 Difference]: With dead ends: 1138 [2021-06-05 14:36:07,104 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 14:36:07,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1307.1ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:36:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 14:36:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 754. [2021-06-05 14:36:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3904382470119523) internal successors, (2553), 753 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2553 transitions. [2021-06-05 14:36:07,113 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2553 transitions. Word has length 19 [2021-06-05 14:36:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:07,113 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2553 transitions. [2021-06-05 14:36:07,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2553 transitions. [2021-06-05 14:36:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:07,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:07,114 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:07,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2956 [2021-06-05 14:36:07,315 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:07,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:07,315 INFO L82 PathProgramCache]: Analyzing trace with hash -288765254, now seen corresponding path program 163 times [2021-06-05 14:36:07,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:07,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582560838] [2021-06-05 14:36:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:07,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:07,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582560838] [2021-06-05 14:36:07,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582560838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:07,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655051956] [2021-06-05 14:36:07,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:07,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:07,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:07,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:07,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:07,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:07,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:07,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:07,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:07,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:07,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:07,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:07,703 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:07,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:07,707 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:07,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:07,711 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:07,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:07,715 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:07,770 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-05 14:36:07,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:07,771 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:273, output treesize:61 [2021-06-05 14:36:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:07,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655051956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:07,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:07,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:07,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919578373] [2021-06-05 14:36:07,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:07,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:07,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:07,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:07,858 INFO L87 Difference]: Start difference. First operand 754 states and 2553 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:08,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:08,837 INFO L93 Difference]: Finished difference Result 1155 states and 3717 transitions. [2021-06-05 14:36:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:36:08,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:08,839 INFO L225 Difference]: With dead ends: 1155 [2021-06-05 14:36:08,839 INFO L226 Difference]: Without dead ends: 1140 [2021-06-05 14:36:08,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 986.7ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:36:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-05 14:36:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 760. [2021-06-05 14:36:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.391304347826087) internal successors, (2574), 759 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2574 transitions. [2021-06-05 14:36:08,848 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2574 transitions. Word has length 19 [2021-06-05 14:36:08,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:08,848 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2574 transitions. [2021-06-05 14:36:08,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:08,848 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2574 transitions. [2021-06-05 14:36:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:08,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:08,849 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:09,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2978,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:09,049 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1723590848, now seen corresponding path program 164 times [2021-06-05 14:36:09,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:09,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415294689] [2021-06-05 14:36:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:09,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:09,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415294689] [2021-06-05 14:36:09,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415294689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:09,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506206350] [2021-06-05 14:36:09,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:09,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:09,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:36:09,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:09,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:09,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:09,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:09,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:09,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:09,519 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:09,523 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:09,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:09,530 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:09,533 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:09,596 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-06-05 14:36:09,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:09,597 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-06-05 14:36:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:09,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506206350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:09,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:09,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:09,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163766644] [2021-06-05 14:36:09,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:09,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:09,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:09,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:09,703 INFO L87 Difference]: Start difference. First operand 760 states and 2574 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:10,181 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 14:36:10,314 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-06-05 14:36:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:10,391 INFO L93 Difference]: Finished difference Result 1210 states and 3856 transitions. [2021-06-05 14:36:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:10,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:10,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:10,392 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 14:36:10,392 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 14:36:10,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 836.6ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:36:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 14:36:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 766. [2021-06-05 14:36:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.3986928104575163) internal successors, (2600), 765 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2600 transitions. [2021-06-05 14:36:10,402 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2600 transitions. Word has length 19 [2021-06-05 14:36:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:10,402 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2600 transitions. [2021-06-05 14:36:10,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2600 transitions. [2021-06-05 14:36:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:10,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:10,410 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:10,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2997,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:10,610 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:10,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:10,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1819976010, now seen corresponding path program 165 times [2021-06-05 14:36:10,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:10,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028095017] [2021-06-05 14:36:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:10,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:10,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028095017] [2021-06-05 14:36:10,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028095017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:10,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879582436] [2021-06-05 14:36:10,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:10,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:10,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:10,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:10,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:11,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:11,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:11,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:11,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:11,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:11,076 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:11,081 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:11,086 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:11,091 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:11,096 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:11,100 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:11,105 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:11,110 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:11,116 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:11,120 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:11,125 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:11,129 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:11,292 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:36:11,292 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 14:36:11,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:36:11,294 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-05 14:36:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:11,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879582436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:11,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:11,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:11,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052173172] [2021-06-05 14:36:11,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:11,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:11,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:11,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:11,498 INFO L87 Difference]: Start difference. First operand 766 states and 2600 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,205 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 14:36:12,476 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 14:36:12,717 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-06-05 14:36:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:12,876 INFO L93 Difference]: Finished difference Result 1471 states and 4478 transitions. [2021-06-05 14:36:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:36:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:12,878 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 14:36:12,878 INFO L226 Difference]: Without dead ends: 1441 [2021-06-05 14:36:12,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1487.8ms TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:36:12,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-06-05 14:36:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 781. [2021-06-05 14:36:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.4166666666666665) internal successors, (2665), 780 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2665 transitions. [2021-06-05 14:36:12,894 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2665 transitions. Word has length 19 [2021-06-05 14:36:12,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:12,894 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2665 transitions. [2021-06-05 14:36:12,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2665 transitions. [2021-06-05 14:36:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:12,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:12,895 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:13,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:13,095 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash -527633610, now seen corresponding path program 166 times [2021-06-05 14:36:13,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:13,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990503450] [2021-06-05 14:36:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:13,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:13,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990503450] [2021-06-05 14:36:13,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990503450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:13,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721301570] [2021-06-05 14:36:13,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:13,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:13,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:13,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:13,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:13,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:13,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:13,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:13,571 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:13,575 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:13,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:13,583 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:13,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:13,590 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:13,595 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:13,598 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:13,602 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:13,606 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:13,610 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:13,613 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:13,768 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 14:36:13,769 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-06-05 14:36:13,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:36:13,770 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-06-05 14:36:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:14,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721301570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:14,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:14,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:14,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301696940] [2021-06-05 14:36:14,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:14,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:14,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:14,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:14,016 INFO L87 Difference]: Start difference. First operand 781 states and 2665 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:14,427 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-06-05 14:36:14,727 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 14:36:15,017 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 14:36:15,268 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-05 14:36:15,488 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 14:36:15,736 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 14:36:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:15,793 INFO L93 Difference]: Finished difference Result 1216 states and 3901 transitions. [2021-06-05 14:36:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:15,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:15,795 INFO L225 Difference]: With dead ends: 1216 [2021-06-05 14:36:15,795 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 14:36:15,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1985.6ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:36:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 14:36:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 776. [2021-06-05 14:36:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.410322580645161) internal successors, (2643), 775 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:15,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2643 transitions. [2021-06-05 14:36:15,805 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2643 transitions. Word has length 19 [2021-06-05 14:36:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:15,805 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2643 transitions. [2021-06-05 14:36:15,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2643 transitions. [2021-06-05 14:36:15,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:15,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:15,806 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:16,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-06-05 14:36:16,006 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash 874968376, now seen corresponding path program 167 times [2021-06-05 14:36:16,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:16,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632403277] [2021-06-05 14:36:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:16,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:16,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632403277] [2021-06-05 14:36:16,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632403277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:16,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705733971] [2021-06-05 14:36:16,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:16,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:16,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:36:16,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:16,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:16,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:16,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:16,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:16,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:16,480 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:16,483 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:16,487 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:16,490 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:16,493 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:16,558 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-06-05 14:36:16,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:36:16,559 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:337, output treesize:67 [2021-06-05 14:36:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:16,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705733971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:16,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:16,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:16,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069099233] [2021-06-05 14:36:16,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:16,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:16,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:16,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:16,656 INFO L87 Difference]: Start difference. First operand 776 states and 2643 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:17,697 INFO L93 Difference]: Finished difference Result 1217 states and 3838 transitions. [2021-06-05 14:36:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:36:17,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:17,699 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 14:36:17,699 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 14:36:17,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:36:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 14:36:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 782. [2021-06-05 14:36:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.418693982074264) internal successors, (2670), 781 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2670 transitions. [2021-06-05 14:36:17,709 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2670 transitions. Word has length 19 [2021-06-05 14:36:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:17,709 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2670 transitions. [2021-06-05 14:36:17,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2670 transitions. [2021-06-05 14:36:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:17,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:17,710 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:17,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-06-05 14:36:17,910 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:17,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1626368814, now seen corresponding path program 168 times [2021-06-05 14:36:17,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:17,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124283412] [2021-06-05 14:36:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:18,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:18,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124283412] [2021-06-05 14:36:18,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124283412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:18,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074068545] [2021-06-05 14:36:18,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:18,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:18,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:18,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:18,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:18,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:18,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:18,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:18,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:18,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:18,332 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:18,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:18,340 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:18,344 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:18,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:18,352 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:18,356 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:18,360 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:18,364 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:18,368 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:18,372 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:18,375 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:18,536 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:36:18,536 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-06-05 14:36:18,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:36:18,538 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-06-05 14:36:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:18,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074068545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:18,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:18,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:18,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818608749] [2021-06-05 14:36:18,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:18,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:18,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:18,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:18,749 INFO L87 Difference]: Start difference. First operand 782 states and 2670 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:19,347 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 14:36:19,548 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 14:36:19,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:19,863 INFO L93 Difference]: Finished difference Result 1347 states and 4170 transitions. [2021-06-05 14:36:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:19,863 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:19,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:19,865 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 14:36:19,866 INFO L226 Difference]: Without dead ends: 1317 [2021-06-05 14:36:19,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1262.2ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:36:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-05 14:36:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 783. [2021-06-05 14:36:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4309462915601023) internal successors, (2683), 782 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2683 transitions. [2021-06-05 14:36:19,881 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2683 transitions. Word has length 19 [2021-06-05 14:36:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:19,882 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2683 transitions. [2021-06-05 14:36:19,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2683 transitions. [2021-06-05 14:36:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:19,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:19,883 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:20,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:20,093 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1376256082, now seen corresponding path program 169 times [2021-06-05 14:36:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:20,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257901829] [2021-06-05 14:36:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:20,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:20,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257901829] [2021-06-05 14:36:20,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257901829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:20,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432882771] [2021-06-05 14:36:20,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:20,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:20,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:20,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:20,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:20,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:20,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:20,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:20,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:20,511 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:20,515 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:20,519 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:20,524 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:20,528 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:20,533 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:20,538 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:20,544 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:20,549 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:20,552 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:20,556 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:20,560 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:20,564 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:20,569 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:20,573 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:20,576 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:20,735 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 14:36:20,735 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-06-05 14:36:20,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:36:20,737 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-06-05 14:36:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:20,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432882771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:20,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:20,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:20,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114844017] [2021-06-05 14:36:20,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:20,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:20,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:20,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:20,974 INFO L87 Difference]: Start difference. First operand 783 states and 2683 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:21,479 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-06-05 14:36:21,680 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-06-05 14:36:21,968 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-05 14:36:21,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:21,999 INFO L93 Difference]: Finished difference Result 1227 states and 3873 transitions. [2021-06-05 14:36:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:22,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:22,001 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 14:36:22,001 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 14:36:22,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1249.9ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:36:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 14:36:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 777. [2021-06-05 14:36:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.4188144329896906) internal successors, (2653), 776 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2653 transitions. [2021-06-05 14:36:22,011 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2653 transitions. Word has length 19 [2021-06-05 14:36:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:22,011 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2653 transitions. [2021-06-05 14:36:22,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:22,012 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2653 transitions. [2021-06-05 14:36:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:22,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:22,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:22,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3090 [2021-06-05 14:36:22,213 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash -908545542, now seen corresponding path program 170 times [2021-06-05 14:36:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:22,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033881175] [2021-06-05 14:36:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:22,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:22,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033881175] [2021-06-05 14:36:22,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033881175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:22,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828982108] [2021-06-05 14:36:22,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:22,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:22,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:22,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:22,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:22,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:22,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:22,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:22,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:22,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:22,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:22,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:22,554 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:22,557 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:22,560 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:22,563 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:22,567 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:22,650 INFO L628 ElimStorePlain]: treesize reduction 45, result has 69.8 percent of original size [2021-06-05 14:36:22,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:22,651 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:376, output treesize:104 [2021-06-05 14:36:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:22,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828982108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:22,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:22,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:22,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366068676] [2021-06-05 14:36:22,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:22,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:22,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:22,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:22,888 INFO L87 Difference]: Start difference. First operand 777 states and 2653 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:23,447 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-05 14:36:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:23,732 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-06-05 14:36:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:23,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:23,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:23,734 INFO L225 Difference]: With dead ends: 1263 [2021-06-05 14:36:23,734 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 14:36:23,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 948.1ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:36:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 14:36:23,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 783. [2021-06-05 14:36:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4271099744245523) internal successors, (2680), 782 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2680 transitions. [2021-06-05 14:36:23,744 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2680 transitions. Word has length 19 [2021-06-05 14:36:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:23,745 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2680 transitions. [2021-06-05 14:36:23,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2680 transitions. [2021-06-05 14:36:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:23,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:23,746 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:23,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3114,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:23,946 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:23,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:23,946 INFO L82 PathProgramCache]: Analyzing trace with hash 715792226, now seen corresponding path program 171 times [2021-06-05 14:36:23,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:23,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053206162] [2021-06-05 14:36:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:24,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:24,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053206162] [2021-06-05 14:36:24,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053206162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:24,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121410448] [2021-06-05 14:36:24,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:24,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:24,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:24,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:24,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:24,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:24,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:24,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:24,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:24,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:24,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:24,281 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:24,284 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:24,287 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:24,291 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:24,294 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:24,297 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:24,378 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-06-05 14:36:24,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:24,379 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-06-05 14:36:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:24,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121410448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:24,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:24,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:36:24,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645895594] [2021-06-05 14:36:24,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:36:24,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:36:24,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:36:24,671 INFO L87 Difference]: Start difference. First operand 783 states and 2680 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:25,106 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 14:36:25,413 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 14:36:25,680 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 14:36:25,898 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 14:36:26,147 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 14:36:26,290 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-06-05 14:36:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:26,362 INFO L93 Difference]: Finished difference Result 1290 states and 4088 transitions. [2021-06-05 14:36:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:26,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:26,364 INFO L225 Difference]: With dead ends: 1290 [2021-06-05 14:36:26,364 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 14:36:26,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1742.6ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:36:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 14:36:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 780. [2021-06-05 14:36:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.4210526315789473) internal successors, (2665), 779 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2665 transitions. [2021-06-05 14:36:26,375 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2665 transitions. Word has length 19 [2021-06-05 14:36:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:26,375 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2665 transitions. [2021-06-05 14:36:26,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2665 transitions. [2021-06-05 14:36:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:36:26,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:26,376 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:26,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3135,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:26,576 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:26,577 INFO L82 PathProgramCache]: Analyzing trace with hash 424469004, now seen corresponding path program 172 times [2021-06-05 14:36:26,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:26,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542477211] [2021-06-05 14:36:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:26,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:26,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542477211] [2021-06-05 14:36:26,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542477211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:26,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239182452] [2021-06-05 14:36:26,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:26,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:26,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:26,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:36:26,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:26,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 14:36:26,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-06-05 14:36:26,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:26,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 14:36:26,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:26,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:36:26,882 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 14:36:26,886 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:36:26,890 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:36:26,989 INFO L628 ElimStorePlain]: treesize reduction 24, result has 81.3 percent of original size [2021-06-05 14:36:26,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:36:26,991 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:104 [2021-06-05 14:36:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:27,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239182452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:27,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:27,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:36:27,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132252906] [2021-06-05 14:36:27,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:36:27,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:27,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:36:27,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:36:27,235 INFO L87 Difference]: Start difference. First operand 780 states and 2665 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:27,669 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-05 14:36:27,913 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 14:36:28,180 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 14:36:28,678 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 14:36:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:28,678 INFO L93 Difference]: Finished difference Result 1248 states and 3944 transitions. [2021-06-05 14:36:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:36:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:28,680 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 14:36:28,680 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 14:36:28,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1505.3ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:36:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 14:36:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 781. [2021-06-05 14:36:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.424358974358974) internal successors, (2671), 780 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2671 transitions. [2021-06-05 14:36:28,690 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2671 transitions. Word has length 19 [2021-06-05 14:36:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:28,690 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2671 transitions. [2021-06-05 14:36:28,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2671 transitions. [2021-06-05 14:36:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:28,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:28,691 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:28,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3158,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:28,892 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2146836536, now seen corresponding path program 2 times [2021-06-05 14:36:28,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:28,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474107492] [2021-06-05 14:36:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:36:28,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:28,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474107492] [2021-06-05 14:36:28,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474107492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:28,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533976817] [2021-06-05 14:36:28,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:28,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:28,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:28,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:29,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533976817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:29,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:29,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2021-06-05 14:36:29,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710265348] [2021-06-05 14:36:29,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:29,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:29,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:29,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:29,083 INFO L87 Difference]: Start difference. First operand 781 states and 2671 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:29,634 INFO L93 Difference]: Finished difference Result 1318 states and 4347 transitions. [2021-06-05 14:36:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:36:29,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:29,636 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 14:36:29,636 INFO L226 Difference]: Without dead ends: 1069 [2021-06-05 14:36:29,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:36:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-05 14:36:29,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 855. [2021-06-05 14:36:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.4168618266978923) internal successors, (2918), 854 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2918 transitions. [2021-06-05 14:36:29,648 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2918 transitions. Word has length 20 [2021-06-05 14:36:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:29,648 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2918 transitions. [2021-06-05 14:36:29,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:29,648 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2918 transitions. [2021-06-05 14:36:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:29,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:29,650 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:29,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3178,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:29,869 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:29,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1544491944, now seen corresponding path program 173 times [2021-06-05 14:36:29,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:29,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584476780] [2021-06-05 14:36:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:29,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:29,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584476780] [2021-06-05 14:36:29,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584476780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:29,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784607313] [2021-06-05 14:36:29,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:29,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:29,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:29,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:29,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784607313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:30,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:36:30,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536424435] [2021-06-05 14:36:30,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:36:30,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:30,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:36:30,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:30,044 INFO L87 Difference]: Start difference. First operand 855 states and 2918 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:30,291 INFO L93 Difference]: Finished difference Result 1161 states and 3732 transitions. [2021-06-05 14:36:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:30,292 INFO L225 Difference]: With dead ends: 1161 [2021-06-05 14:36:30,292 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 14:36:30,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 14:36:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 868. [2021-06-05 14:36:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.4140715109573243) internal successors, (2960), 867 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2960 transitions. [2021-06-05 14:36:30,302 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2960 transitions. Word has length 20 [2021-06-05 14:36:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:30,302 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2960 transitions. [2021-06-05 14:36:30,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2960 transitions. [2021-06-05 14:36:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:30,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:30,303 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:30,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3181 [2021-06-05 14:36:30,504 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:30,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1192264290, now seen corresponding path program 174 times [2021-06-05 14:36:30,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:30,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672423083] [2021-06-05 14:36:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:30,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672423083] [2021-06-05 14:36:30,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672423083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166518450] [2021-06-05 14:36:30,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:30,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:30,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:30,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:30,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:30,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166518450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:30,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:30,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:36:30,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050850978] [2021-06-05 14:36:30,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:30,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:30,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:30,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:30,693 INFO L87 Difference]: Start difference. First operand 868 states and 2960 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:30,930 INFO L93 Difference]: Finished difference Result 1135 states and 3672 transitions. [2021-06-05 14:36:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:30,931 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 14:36:30,931 INFO L226 Difference]: Without dead ends: 1135 [2021-06-05 14:36:30,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-06-05 14:36:30,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 871. [2021-06-05 14:36:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4114942528735632) internal successors, (2968), 870 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-06-05 14:36:30,941 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-06-05 14:36:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:30,941 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-06-05 14:36:30,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-06-05 14:36:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:30,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:30,942 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:31,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3183,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:31,143 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:31,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:31,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1978318310, now seen corresponding path program 175 times [2021-06-05 14:36:31,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:31,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965860608] [2021-06-05 14:36:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:31,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:31,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965860608] [2021-06-05 14:36:31,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965860608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:31,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844368975] [2021-06-05 14:36:31,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:31,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:31,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:31,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844368975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:31,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:31,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:31,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110814104] [2021-06-05 14:36:31,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:31,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:31,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:31,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:31,371 INFO L87 Difference]: Start difference. First operand 871 states and 2968 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:31,854 INFO L93 Difference]: Finished difference Result 1111 states and 3575 transitions. [2021-06-05 14:36:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:31,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:31,855 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 14:36:31,855 INFO L226 Difference]: Without dead ends: 1104 [2021-06-05 14:36:31,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 479.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:31,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-05 14:36:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 884. [2021-06-05 14:36:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.406568516421291) internal successors, (3008), 883 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3008 transitions. [2021-06-05 14:36:31,865 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3008 transitions. Word has length 20 [2021-06-05 14:36:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:31,865 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3008 transitions. [2021-06-05 14:36:31,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3008 transitions. [2021-06-05 14:36:31,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:31,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:31,867 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:32,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3185 [2021-06-05 14:36:32,067 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:32,067 INFO L82 PathProgramCache]: Analyzing trace with hash -483906072, now seen corresponding path program 176 times [2021-06-05 14:36:32,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:32,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627269678] [2021-06-05 14:36:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:32,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:32,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627269678] [2021-06-05 14:36:32,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627269678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:32,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322628740] [2021-06-05 14:36:32,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:32,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:32,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:32,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:32,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:32,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322628740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:32,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:32,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:36:32,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212719047] [2021-06-05 14:36:32,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:32,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:32,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:32,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:32,274 INFO L87 Difference]: Start difference. First operand 884 states and 3008 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:32,631 INFO L93 Difference]: Finished difference Result 1167 states and 3744 transitions. [2021-06-05 14:36:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:32,631 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:32,633 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 14:36:32,633 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 14:36:32,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 14:36:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 884. [2021-06-05 14:36:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.406568516421291) internal successors, (3008), 883 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3008 transitions. [2021-06-05 14:36:32,643 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3008 transitions. Word has length 20 [2021-06-05 14:36:32,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:32,643 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3008 transitions. [2021-06-05 14:36:32,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3008 transitions. [2021-06-05 14:36:32,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:32,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:32,644 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:32,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3191,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:32,845 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:32,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:32,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1977813794, now seen corresponding path program 177 times [2021-06-05 14:36:32,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:32,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789827842] [2021-06-05 14:36:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:32,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:32,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789827842] [2021-06-05 14:36:32,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789827842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:32,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859779361] [2021-06-05 14:36:32,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:32,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:32,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:32,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:32,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859779361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:33,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:36:33,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984064549] [2021-06-05 14:36:33,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:33,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:33,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:33,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:33,041 INFO L87 Difference]: Start difference. First operand 884 states and 3008 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:33,290 INFO L93 Difference]: Finished difference Result 1124 states and 3641 transitions. [2021-06-05 14:36:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:33,291 INFO L225 Difference]: With dead ends: 1124 [2021-06-05 14:36:33,291 INFO L226 Difference]: Without dead ends: 1118 [2021-06-05 14:36:33,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-06-05 14:36:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 884. [2021-06-05 14:36:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.40317100792752) internal successors, (3005), 883 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3005 transitions. [2021-06-05 14:36:33,301 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3005 transitions. Word has length 20 [2021-06-05 14:36:33,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:33,301 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3005 transitions. [2021-06-05 14:36:33,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3005 transitions. [2021-06-05 14:36:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:33,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:33,302 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:33,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3195 [2021-06-05 14:36:33,503 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:33,503 INFO L82 PathProgramCache]: Analyzing trace with hash 876210668, now seen corresponding path program 178 times [2021-06-05 14:36:33,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:33,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642158126] [2021-06-05 14:36:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:33,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642158126] [2021-06-05 14:36:33,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642158126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220083238] [2021-06-05 14:36:33,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:33,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:33,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:33,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:33,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220083238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:33,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:33,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:33,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057336746] [2021-06-05 14:36:33,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:33,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:33,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:33,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:33,749 INFO L87 Difference]: Start difference. First operand 884 states and 3005 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:34,082 INFO L93 Difference]: Finished difference Result 1074 states and 3498 transitions. [2021-06-05 14:36:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:34,082 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:34,083 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 14:36:34,083 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 14:36:34,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 14:36:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 871. [2021-06-05 14:36:34,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4114942528735632) internal successors, (2968), 870 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-06-05 14:36:34,093 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-06-05 14:36:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:34,093 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-06-05 14:36:34,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-06-05 14:36:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:34,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:34,094 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:34,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:34,295 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:34,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163430, now seen corresponding path program 179 times [2021-06-05 14:36:34,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:34,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260325977] [2021-06-05 14:36:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:34,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:34,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260325977] [2021-06-05 14:36:34,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260325977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:34,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171835767] [2021-06-05 14:36:34,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:34,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:34,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:34,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:34,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:34,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171835767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:34,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:34,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:34,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450444027] [2021-06-05 14:36:34,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:34,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:34,520 INFO L87 Difference]: Start difference. First operand 871 states and 2968 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:34,804 INFO L93 Difference]: Finished difference Result 1008 states and 3320 transitions. [2021-06-05 14:36:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:34,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:34,806 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 14:36:34,806 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 14:36:34,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 14:36:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 874. [2021-06-05 14:36:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.40893470790378) internal successors, (2976), 873 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2976 transitions. [2021-06-05 14:36:34,816 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2976 transitions. Word has length 20 [2021-06-05 14:36:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:34,816 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2976 transitions. [2021-06-05 14:36:34,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2976 transitions. [2021-06-05 14:36:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:34,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:34,817 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:35,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3205,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:35,018 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash -926805212, now seen corresponding path program 180 times [2021-06-05 14:36:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:35,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754445725] [2021-06-05 14:36:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:35,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754445725] [2021-06-05 14:36:35,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754445725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430739947] [2021-06-05 14:36:35,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:35,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:35,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:35,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430739947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:35,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:35,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238780031] [2021-06-05 14:36:35,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:35,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:35,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:35,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:35,222 INFO L87 Difference]: Start difference. First operand 874 states and 2976 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:35,458 INFO L93 Difference]: Finished difference Result 1031 states and 3380 transitions. [2021-06-05 14:36:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:35,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:35,459 INFO L225 Difference]: With dead ends: 1031 [2021-06-05 14:36:35,459 INFO L226 Difference]: Without dead ends: 1031 [2021-06-05 14:36:35,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:35,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-05 14:36:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 871. [2021-06-05 14:36:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4114942528735632) internal successors, (2968), 870 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-06-05 14:36:35,469 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-06-05 14:36:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:35,469 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-06-05 14:36:35,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-06-05 14:36:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:35,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:35,470 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:35,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-06-05 14:36:35,671 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1673472592, now seen corresponding path program 181 times [2021-06-05 14:36:35,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:35,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116166495] [2021-06-05 14:36:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:35,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116166495] [2021-06-05 14:36:35,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116166495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369054659] [2021-06-05 14:36:35,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:35,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369054659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:35,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:35,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:35,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705222761] [2021-06-05 14:36:35,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:35,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:35,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:35,887 INFO L87 Difference]: Start difference. First operand 871 states and 2968 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:36,187 INFO L93 Difference]: Finished difference Result 1075 states and 3471 transitions. [2021-06-05 14:36:36,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:36,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:36,188 INFO L225 Difference]: With dead ends: 1075 [2021-06-05 14:36:36,188 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 14:36:36,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 301.6ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 14:36:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 880. [2021-06-05 14:36:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4175199089874857) internal successors, (3004), 879 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3004 transitions. [2021-06-05 14:36:36,198 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3004 transitions. Word has length 20 [2021-06-05 14:36:36,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:36,198 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3004 transitions. [2021-06-05 14:36:36,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3004 transitions. [2021-06-05 14:36:36,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:36,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:36,199 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:36,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3212,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:36,400 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:36,400 INFO L82 PathProgramCache]: Analyzing trace with hash 305325820, now seen corresponding path program 182 times [2021-06-05 14:36:36,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:36,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713085356] [2021-06-05 14:36:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:36,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:36,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713085356] [2021-06-05 14:36:36,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713085356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:36,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505965531] [2021-06-05 14:36:36,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:36,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:36,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:36,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:36,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:36,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505965531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:36,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:36,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:36,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509788720] [2021-06-05 14:36:36,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:36,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:36,665 INFO L87 Difference]: Start difference. First operand 880 states and 3004 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:36,919 INFO L93 Difference]: Finished difference Result 1003 states and 3305 transitions. [2021-06-05 14:36:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:36,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:36,920 INFO L225 Difference]: With dead ends: 1003 [2021-06-05 14:36:36,921 INFO L226 Difference]: Without dead ends: 991 [2021-06-05 14:36:36,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-06-05 14:36:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 880. [2021-06-05 14:36:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4141069397042094) internal successors, (3001), 879 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-06-05 14:36:36,930 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-06-05 14:36:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:36,930 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-06-05 14:36:36,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-06-05 14:36:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:36,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:36,931 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:37,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:37,132 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash 475323944, now seen corresponding path program 183 times [2021-06-05 14:36:37,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:37,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844208295] [2021-06-05 14:36:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:37,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844208295] [2021-06-05 14:36:37,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844208295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061881900] [2021-06-05 14:36:37,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:37,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:37,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:37,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061881900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:37,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:37,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490096795] [2021-06-05 14:36:37,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:37,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:37,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:37,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:37,340 INFO L87 Difference]: Start difference. First operand 880 states and 3001 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:37,556 INFO L93 Difference]: Finished difference Result 1012 states and 3329 transitions. [2021-06-05 14:36:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:37,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:37,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:37,558 INFO L225 Difference]: With dead ends: 1012 [2021-06-05 14:36:37,558 INFO L226 Difference]: Without dead ends: 1012 [2021-06-05 14:36:37,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-05 14:36:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 874. [2021-06-05 14:36:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.40893470790378) internal successors, (2976), 873 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2976 transitions. [2021-06-05 14:36:37,569 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2976 transitions. Word has length 20 [2021-06-05 14:36:37,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:37,569 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2976 transitions. [2021-06-05 14:36:37,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2976 transitions. [2021-06-05 14:36:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:37,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:37,570 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:37,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3221 [2021-06-05 14:36:37,771 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1887721840, now seen corresponding path program 184 times [2021-06-05 14:36:37,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:37,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119140494] [2021-06-05 14:36:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:37,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:37,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119140494] [2021-06-05 14:36:37,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119140494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:37,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712416039] [2021-06-05 14:36:37,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:37,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:37,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:37,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712416039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:38,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:38,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347255520] [2021-06-05 14:36:38,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:38,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:38,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:38,075 INFO L87 Difference]: Start difference. First operand 874 states and 2976 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:38,328 INFO L93 Difference]: Finished difference Result 1001 states and 3278 transitions. [2021-06-05 14:36:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:38,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:38,329 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 14:36:38,329 INFO L226 Difference]: Without dead ends: 987 [2021-06-05 14:36:38,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:38,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-06-05 14:36:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 874. [2021-06-05 14:36:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4054982817869415) internal successors, (2973), 873 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2973 transitions. [2021-06-05 14:36:38,339 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2973 transitions. Word has length 20 [2021-06-05 14:36:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:38,339 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2973 transitions. [2021-06-05 14:36:38,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2973 transitions. [2021-06-05 14:36:38,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:38,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:38,340 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:38,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3224,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:38,540 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:38,541 INFO L82 PathProgramCache]: Analyzing trace with hash -470577356, now seen corresponding path program 185 times [2021-06-05 14:36:38,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:38,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103186347] [2021-06-05 14:36:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:38,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103186347] [2021-06-05 14:36:38,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103186347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257957590] [2021-06-05 14:36:38,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:38,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:38,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:38,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:38,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:38,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257957590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:38,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:38,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:38,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758180715] [2021-06-05 14:36:38,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:38,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:38,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:38,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:38,766 INFO L87 Difference]: Start difference. First operand 874 states and 2973 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:38,995 INFO L93 Difference]: Finished difference Result 1011 states and 3308 transitions. [2021-06-05 14:36:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:38,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:38,996 INFO L225 Difference]: With dead ends: 1011 [2021-06-05 14:36:38,996 INFO L226 Difference]: Without dead ends: 1011 [2021-06-05 14:36:38,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-06-05 14:36:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 871. [2021-06-05 14:36:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4045977011494255) internal successors, (2962), 870 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-06-05 14:36:39,006 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-06-05 14:36:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:39,006 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-06-05 14:36:39,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-06-05 14:36:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:39,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:39,007 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:39,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-06-05 14:36:39,208 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:39,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2049796036, now seen corresponding path program 186 times [2021-06-05 14:36:39,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:39,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942825068] [2021-06-05 14:36:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:39,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:39,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942825068] [2021-06-05 14:36:39,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942825068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:39,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326282443] [2021-06-05 14:36:39,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:39,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:36:39,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:39,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:39,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:39,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326282443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:39,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:39,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:39,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975700437] [2021-06-05 14:36:39,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:39,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:39,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:39,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:39,438 INFO L87 Difference]: Start difference. First operand 871 states and 2962 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:39,690 INFO L93 Difference]: Finished difference Result 1030 states and 3364 transitions. [2021-06-05 14:36:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:39,692 INFO L225 Difference]: With dead ends: 1030 [2021-06-05 14:36:39,692 INFO L226 Difference]: Without dead ends: 1030 [2021-06-05 14:36:39,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-05 14:36:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 871. [2021-06-05 14:36:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4045977011494255) internal successors, (2962), 870 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-06-05 14:36:39,704 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-06-05 14:36:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:39,704 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-06-05 14:36:39,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-06-05 14:36:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:39,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:39,705 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:39,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:39,906 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:39,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1256631376, now seen corresponding path program 187 times [2021-06-05 14:36:39,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:39,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143645353] [2021-06-05 14:36:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:39,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:39,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143645353] [2021-06-05 14:36:39,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143645353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:39,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078635863] [2021-06-05 14:36:39,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:40,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:40,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078635863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:40,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:40,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967282447] [2021-06-05 14:36:40,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:40,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:40,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:40,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:40,125 INFO L87 Difference]: Start difference. First operand 871 states and 2962 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:40,360 INFO L93 Difference]: Finished difference Result 996 states and 3273 transitions. [2021-06-05 14:36:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:40,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:40,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:40,362 INFO L225 Difference]: With dead ends: 996 [2021-06-05 14:36:40,362 INFO L226 Difference]: Without dead ends: 996 [2021-06-05 14:36:40,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-05 14:36:40,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 868. [2021-06-05 14:36:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.4071510957324107) internal successors, (2954), 867 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2954 transitions. [2021-06-05 14:36:40,371 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2954 transitions. Word has length 20 [2021-06-05 14:36:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:40,371 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2954 transitions. [2021-06-05 14:36:40,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2954 transitions. [2021-06-05 14:36:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:40,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:40,372 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:40,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3238 [2021-06-05 14:36:40,573 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:40,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1922977178, now seen corresponding path program 188 times [2021-06-05 14:36:40,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:40,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892205772] [2021-06-05 14:36:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:40,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892205772] [2021-06-05 14:36:40,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892205772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735239366] [2021-06-05 14:36:40,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:40,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:40,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:40,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:40,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:40,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735239366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:40,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:40,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:40,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499910363] [2021-06-05 14:36:40,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:40,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:40,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:40,780 INFO L87 Difference]: Start difference. First operand 868 states and 2954 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:41,019 INFO L93 Difference]: Finished difference Result 1048 states and 3390 transitions. [2021-06-05 14:36:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:41,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:41,020 INFO L225 Difference]: With dead ends: 1048 [2021-06-05 14:36:41,020 INFO L226 Difference]: Without dead ends: 1041 [2021-06-05 14:36:41,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-06-05 14:36:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 887. [2021-06-05 14:36:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.404063205417607) internal successors, (3016), 886 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3016 transitions. [2021-06-05 14:36:41,030 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3016 transitions. Word has length 20 [2021-06-05 14:36:41,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:41,030 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3016 transitions. [2021-06-05 14:36:41,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,030 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3016 transitions. [2021-06-05 14:36:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:41,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:41,031 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:41,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:41,231 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:41,231 INFO L82 PathProgramCache]: Analyzing trace with hash 138387140, now seen corresponding path program 189 times [2021-06-05 14:36:41,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:41,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696144021] [2021-06-05 14:36:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:41,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696144021] [2021-06-05 14:36:41,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696144021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094833516] [2021-06-05 14:36:41,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:41,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:41,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:41,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:41,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094833516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:41,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:41,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50907550] [2021-06-05 14:36:41,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:41,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:41,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:41,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:41,450 INFO L87 Difference]: Start difference. First operand 887 states and 3016 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:41,693 INFO L93 Difference]: Finished difference Result 1045 states and 3392 transitions. [2021-06-05 14:36:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:41,693 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:41,694 INFO L225 Difference]: With dead ends: 1045 [2021-06-05 14:36:41,694 INFO L226 Difference]: Without dead ends: 1045 [2021-06-05 14:36:41,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:41,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-06-05 14:36:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 887. [2021-06-05 14:36:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.404063205417607) internal successors, (3016), 886 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3016 transitions. [2021-06-05 14:36:41,704 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3016 transitions. Word has length 20 [2021-06-05 14:36:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:41,704 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3016 transitions. [2021-06-05 14:36:41,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3016 transitions. [2021-06-05 14:36:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:41,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:41,705 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:41,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3249,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:41,905 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:41,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1922472662, now seen corresponding path program 190 times [2021-06-05 14:36:41,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:41,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038645942] [2021-06-05 14:36:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:41,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:41,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038645942] [2021-06-05 14:36:41,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038645942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:41,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400319319] [2021-06-05 14:36:41,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:42,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:42,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:42,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400319319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:42,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:42,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456056064] [2021-06-05 14:36:42,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:42,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:42,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:42,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:42,185 INFO L87 Difference]: Start difference. First operand 887 states and 3016 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:42,496 INFO L93 Difference]: Finished difference Result 1051 states and 3399 transitions. [2021-06-05 14:36:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:42,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:42,497 INFO L225 Difference]: With dead ends: 1051 [2021-06-05 14:36:42,497 INFO L226 Difference]: Without dead ends: 1045 [2021-06-05 14:36:42,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-06-05 14:36:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 887. [2021-06-05 14:36:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.4006772009029347) internal successors, (3013), 886 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3013 transitions. [2021-06-05 14:36:42,507 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3013 transitions. Word has length 20 [2021-06-05 14:36:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:42,507 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3013 transitions. [2021-06-05 14:36:42,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:42,507 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3013 transitions. [2021-06-05 14:36:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:42,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:42,508 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:42,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3256 [2021-06-05 14:36:42,709 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:42,709 INFO L82 PathProgramCache]: Analyzing trace with hash 931551800, now seen corresponding path program 191 times [2021-06-05 14:36:42,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:42,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849856511] [2021-06-05 14:36:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:42,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849856511] [2021-06-05 14:36:42,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849856511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541783234] [2021-06-05 14:36:42,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:42,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:42,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:42,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:42,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541783234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:42,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:42,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:42,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471751647] [2021-06-05 14:36:42,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:42,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:42,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:42,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:42,910 INFO L87 Difference]: Start difference. First operand 887 states and 3013 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:43,192 INFO L93 Difference]: Finished difference Result 1050 states and 3400 transitions. [2021-06-05 14:36:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:43,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:43,193 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 14:36:43,194 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 14:36:43,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 14:36:43,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 884. [2021-06-05 14:36:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.40317100792752) internal successors, (3005), 883 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3005 transitions. [2021-06-05 14:36:43,203 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3005 transitions. Word has length 20 [2021-06-05 14:36:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:43,204 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3005 transitions. [2021-06-05 14:36:43,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3005 transitions. [2021-06-05 14:36:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:43,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:43,205 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:43,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3263 [2021-06-05 14:36:43,405 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:43,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1384617084, now seen corresponding path program 192 times [2021-06-05 14:36:43,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:43,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357315922] [2021-06-05 14:36:43,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:43,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:43,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357315922] [2021-06-05 14:36:43,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357315922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:43,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849187959] [2021-06-05 14:36:43,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:43,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:43,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:43,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:43,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:43,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849187959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:43,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:43,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:43,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847643813] [2021-06-05 14:36:43,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:43,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:43,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:43,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:43,625 INFO L87 Difference]: Start difference. First operand 884 states and 3005 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:43,886 INFO L93 Difference]: Finished difference Result 1009 states and 3304 transitions. [2021-06-05 14:36:43,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:43,886 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:43,887 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 14:36:43,887 INFO L226 Difference]: Without dead ends: 997 [2021-06-05 14:36:43,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-05 14:36:43,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 884. [2021-06-05 14:36:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.3997734994337487) internal successors, (3002), 883 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3002 transitions. [2021-06-05 14:36:43,896 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3002 transitions. Word has length 20 [2021-06-05 14:36:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:43,896 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3002 transitions. [2021-06-05 14:36:43,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3002 transitions. [2021-06-05 14:36:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:43,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:43,897 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:44,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:44,106 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:44,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1214618960, now seen corresponding path program 193 times [2021-06-05 14:36:44,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:44,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100051716] [2021-06-05 14:36:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:44,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:44,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100051716] [2021-06-05 14:36:44,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100051716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:44,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475382261] [2021-06-05 14:36:44,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:44,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:44,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:44,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475382261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:44,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:44,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:44,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091978406] [2021-06-05 14:36:44,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:44,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:44,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:44,307 INFO L87 Difference]: Start difference. First operand 884 states and 3002 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:44,532 INFO L93 Difference]: Finished difference Result 1011 states and 3313 transitions. [2021-06-05 14:36:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:44,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:44,534 INFO L225 Difference]: With dead ends: 1011 [2021-06-05 14:36:44,534 INFO L226 Difference]: Without dead ends: 1011 [2021-06-05 14:36:44,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-06-05 14:36:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 871. [2021-06-05 14:36:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4045977011494255) internal successors, (2962), 870 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-06-05 14:36:44,544 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-06-05 14:36:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:44,544 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-06-05 14:36:44,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-06-05 14:36:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:44,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:44,545 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:44,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-06-05 14:36:44,746 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:44,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:44,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1043292698, now seen corresponding path program 194 times [2021-06-05 14:36:44,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:44,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321860850] [2021-06-05 14:36:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:44,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:44,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321860850] [2021-06-05 14:36:44,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321860850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:44,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639052675] [2021-06-05 14:36:44,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:44,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:44,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:44,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:44,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:44,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639052675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:44,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:44,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:36:44,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233007313] [2021-06-05 14:36:44,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:44,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:44,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:44,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:44,953 INFO L87 Difference]: Start difference. First operand 871 states and 2962 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:45,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:45,217 INFO L93 Difference]: Finished difference Result 1151 states and 3681 transitions. [2021-06-05 14:36:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:45,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:45,219 INFO L225 Difference]: With dead ends: 1151 [2021-06-05 14:36:45,219 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 14:36:45,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:45,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 14:36:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 893. [2021-06-05 14:36:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4024663677130045) internal successors, (3035), 892 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3035 transitions. [2021-06-05 14:36:45,229 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3035 transitions. Word has length 20 [2021-06-05 14:36:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:45,229 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3035 transitions. [2021-06-05 14:36:45,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3035 transitions. [2021-06-05 14:36:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:45,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:45,231 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:45,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3275 [2021-06-05 14:36:45,431 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:45,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1190310280, now seen corresponding path program 195 times [2021-06-05 14:36:45,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:45,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076153032] [2021-06-05 14:36:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:45,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:45,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076153032] [2021-06-05 14:36:45,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076153032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:45,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175481682] [2021-06-05 14:36:45,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:45,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:45,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:45,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:45,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175481682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:45,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:45,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:45,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630044495] [2021-06-05 14:36:45,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:45,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:45,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:45,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:45,683 INFO L87 Difference]: Start difference. First operand 893 states and 3035 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:46,014 INFO L93 Difference]: Finished difference Result 1136 states and 3648 transitions. [2021-06-05 14:36:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:46,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:46,015 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 14:36:46,015 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 14:36:46,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 14:36:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 893. [2021-06-05 14:36:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4024663677130045) internal successors, (3035), 892 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3035 transitions. [2021-06-05 14:36:46,026 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3035 transitions. Word has length 20 [2021-06-05 14:36:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:46,026 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3035 transitions. [2021-06-05 14:36:46,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3035 transitions. [2021-06-05 14:36:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:46,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:46,027 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:46,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3279,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:46,227 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1043797214, now seen corresponding path program 196 times [2021-06-05 14:36:46,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:46,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493178281] [2021-06-05 14:36:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:46,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:46,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493178281] [2021-06-05 14:36:46,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493178281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:46,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199143807] [2021-06-05 14:36:46,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:46,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:46,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:46,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:46,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199143807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:46,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:46,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:46,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109444705] [2021-06-05 14:36:46,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:46,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:46,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:46,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:46,505 INFO L87 Difference]: Start difference. First operand 893 states and 3035 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:46,917 INFO L93 Difference]: Finished difference Result 1142 states and 3655 transitions. [2021-06-05 14:36:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:46,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:46,919 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 14:36:46,919 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 14:36:46,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 14:36:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 893. [2021-06-05 14:36:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.399103139013453) internal successors, (3032), 892 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3032 transitions. [2021-06-05 14:36:46,929 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3032 transitions. Word has length 20 [2021-06-05 14:36:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:46,929 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3032 transitions. [2021-06-05 14:36:46,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3032 transitions. [2021-06-05 14:36:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:46,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:46,930 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:47,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-06-05 14:36:47,130 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:47,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:47,131 INFO L82 PathProgramCache]: Analyzing trace with hash -397145620, now seen corresponding path program 197 times [2021-06-05 14:36:47,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:47,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621371442] [2021-06-05 14:36:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:47,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:47,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621371442] [2021-06-05 14:36:47,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621371442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:47,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415508561] [2021-06-05 14:36:47,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:47,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:36:47,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:47,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:47,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:47,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415508561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:47,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:47,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:36:47,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082903000] [2021-06-05 14:36:47,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:47,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:47,352 INFO L87 Difference]: Start difference. First operand 893 states and 3032 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:47,671 INFO L93 Difference]: Finished difference Result 1153 states and 3691 transitions. [2021-06-05 14:36:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:36:47,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:47,673 INFO L225 Difference]: With dead ends: 1153 [2021-06-05 14:36:47,673 INFO L226 Difference]: Without dead ends: 1153 [2021-06-05 14:36:47,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:47,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-05 14:36:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 890. [2021-06-05 14:36:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4015748031496065) internal successors, (3024), 889 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3024 transitions. [2021-06-05 14:36:47,683 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3024 transitions. Word has length 20 [2021-06-05 14:36:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:47,683 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3024 transitions. [2021-06-05 14:36:47,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3024 transitions. [2021-06-05 14:36:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:47,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:47,684 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:47,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3292 [2021-06-05 14:36:47,885 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:47,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1581652792, now seen corresponding path program 198 times [2021-06-05 14:36:47,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:47,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4962560] [2021-06-05 14:36:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:47,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:47,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4962560] [2021-06-05 14:36:47,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4962560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:47,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492066057] [2021-06-05 14:36:47,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:48,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:48,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:48,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:48,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:48,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492066057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:48,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:48,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:48,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574217922] [2021-06-05 14:36:48,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:48,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:48,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:48,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:48,122 INFO L87 Difference]: Start difference. First operand 890 states and 3024 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:48,446 INFO L93 Difference]: Finished difference Result 1106 states and 3573 transitions. [2021-06-05 14:36:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:48,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:48,448 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 14:36:48,448 INFO L226 Difference]: Without dead ends: 1094 [2021-06-05 14:36:48,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 351.0ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-05 14:36:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 890. [2021-06-05 14:36:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.3982002249718786) internal successors, (3021), 889 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3021 transitions. [2021-06-05 14:36:48,458 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3021 transitions. Word has length 20 [2021-06-05 14:36:48,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:48,458 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3021 transitions. [2021-06-05 14:36:48,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3021 transitions. [2021-06-05 14:36:48,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:48,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:48,459 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:48,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-06-05 14:36:48,660 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:48,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:48,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1751650916, now seen corresponding path program 199 times [2021-06-05 14:36:48,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:48,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169969891] [2021-06-05 14:36:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:48,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:48,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169969891] [2021-06-05 14:36:48,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169969891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:48,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310663054] [2021-06-05 14:36:48,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:48,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:48,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310663054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:48,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:48,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:36:48,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825205219] [2021-06-05 14:36:48,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:48,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:48,865 INFO L87 Difference]: Start difference. First operand 890 states and 3021 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:49,116 INFO L93 Difference]: Finished difference Result 1139 states and 3670 transitions. [2021-06-05 14:36:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:49,118 INFO L225 Difference]: With dead ends: 1139 [2021-06-05 14:36:49,118 INFO L226 Difference]: Without dead ends: 1139 [2021-06-05 14:36:49,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-05 14:36:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 887. [2021-06-05 14:36:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.4006772009029347) internal successors, (3013), 886 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3013 transitions. [2021-06-05 14:36:49,128 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3013 transitions. Word has length 20 [2021-06-05 14:36:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:49,129 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3013 transitions. [2021-06-05 14:36:49,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3013 transitions. [2021-06-05 14:36:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:49,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:49,130 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:49,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:49,330 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:49,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2125569182, now seen corresponding path program 200 times [2021-06-05 14:36:49,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:49,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205289062] [2021-06-05 14:36:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:49,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:49,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205289062] [2021-06-05 14:36:49,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205289062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:49,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367623790] [2021-06-05 14:36:49,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:49,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:49,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:49,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:49,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:49,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367623790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:49,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:49,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:36:49,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324344932] [2021-06-05 14:36:49,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:49,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:49,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:49,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:49,545 INFO L87 Difference]: Start difference. First operand 887 states and 3013 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:49,832 INFO L93 Difference]: Finished difference Result 1097 states and 3549 transitions. [2021-06-05 14:36:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:49,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:49,834 INFO L225 Difference]: With dead ends: 1097 [2021-06-05 14:36:49,834 INFO L226 Difference]: Without dead ends: 1079 [2021-06-05 14:36:49,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:36:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-05 14:36:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 887. [2021-06-05 14:36:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.3972911963882617) internal successors, (3010), 886 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3010 transitions. [2021-06-05 14:36:49,843 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3010 transitions. Word has length 20 [2021-06-05 14:36:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:49,844 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3010 transitions. [2021-06-05 14:36:49,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3010 transitions. [2021-06-05 14:36:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:49,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:49,845 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:50,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:50,045 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:50,045 INFO L82 PathProgramCache]: Analyzing trace with hash 738958384, now seen corresponding path program 201 times [2021-06-05 14:36:50,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:50,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764240335] [2021-06-05 14:36:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:50,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:50,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764240335] [2021-06-05 14:36:50,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764240335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:50,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216031170] [2021-06-05 14:36:50,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:50,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:50,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:50,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:50,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:50,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216031170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:50,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:50,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:36:50,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130400587] [2021-06-05 14:36:50,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:36:50,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:50,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:36:50,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:36:50,234 INFO L87 Difference]: Start difference. First operand 887 states and 3010 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:50,478 INFO L93 Difference]: Finished difference Result 1159 states and 3711 transitions. [2021-06-05 14:36:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:50,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:50,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:50,480 INFO L225 Difference]: With dead ends: 1159 [2021-06-05 14:36:50,480 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 14:36:50,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:36:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 14:36:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 871. [2021-06-05 14:36:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.401149425287356) internal successors, (2959), 870 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-06-05 14:36:50,490 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-06-05 14:36:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:50,490 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-06-05 14:36:50,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-06-05 14:36:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:50,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:50,491 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:50,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-06-05 14:36:50,691 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:50,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1803358238, now seen corresponding path program 202 times [2021-06-05 14:36:50,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:50,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700366135] [2021-06-05 14:36:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:50,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:50,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700366135] [2021-06-05 14:36:50,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700366135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:50,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773708753] [2021-06-05 14:36:50,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:50,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:50,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:50,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:50,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:50,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773708753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:50,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:50,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:36:50,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313722512] [2021-06-05 14:36:50,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:36:50,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:36:50,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:36:50,901 INFO L87 Difference]: Start difference. First operand 871 states and 2959 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:51,240 INFO L93 Difference]: Finished difference Result 1282 states and 4043 transitions. [2021-06-05 14:36:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:51,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:51,241 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 14:36:51,242 INFO L226 Difference]: Without dead ends: 1282 [2021-06-05 14:36:51,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:36:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-06-05 14:36:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 871. [2021-06-05 14:36:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.401149425287356) internal successors, (2959), 870 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-06-05 14:36:51,252 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-06-05 14:36:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:51,252 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-06-05 14:36:51,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-06-05 14:36:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:51,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:51,253 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:51,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:51,461 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:51,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash 672713702, now seen corresponding path program 203 times [2021-06-05 14:36:51,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:51,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383904887] [2021-06-05 14:36:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:51,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:51,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383904887] [2021-06-05 14:36:51,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383904887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:51,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215448868] [2021-06-05 14:36:51,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:51,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:51,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:51,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:51,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:51,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215448868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:51,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:51,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:51,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957872279] [2021-06-05 14:36:51,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:51,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:51,721 INFO L87 Difference]: Start difference. First operand 871 states and 2959 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:52,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:52,139 INFO L93 Difference]: Finished difference Result 1117 states and 3611 transitions. [2021-06-05 14:36:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:52,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:52,140 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 14:36:52,141 INFO L226 Difference]: Without dead ends: 1103 [2021-06-05 14:36:52,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:52,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-06-05 14:36:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 871. [2021-06-05 14:36:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.401149425287356) internal successors, (2959), 870 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-06-05 14:36:52,150 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-06-05 14:36:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:52,150 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-06-05 14:36:52,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-06-05 14:36:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:52,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:52,151 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:52,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:52,352 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:52,352 INFO L82 PathProgramCache]: Analyzing trace with hash -245147176, now seen corresponding path program 204 times [2021-06-05 14:36:52,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:52,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715532044] [2021-06-05 14:36:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:52,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:52,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715532044] [2021-06-05 14:36:52,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715532044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:52,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313059041] [2021-06-05 14:36:52,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:52,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:52,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:52,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:52,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313059041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:52,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:52,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:52,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733370989] [2021-06-05 14:36:52,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:52,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:52,571 INFO L87 Difference]: Start difference. First operand 871 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:53,054 INFO L93 Difference]: Finished difference Result 1319 states and 4131 transitions. [2021-06-05 14:36:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:36:53,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:53,056 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 14:36:53,056 INFO L226 Difference]: Without dead ends: 1319 [2021-06-05 14:36:53,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 427.0ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:36:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-06-05 14:36:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 874. [2021-06-05 14:36:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.3986254295532645) internal successors, (2967), 873 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2967 transitions. [2021-06-05 14:36:53,066 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2967 transitions. Word has length 20 [2021-06-05 14:36:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:53,066 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2967 transitions. [2021-06-05 14:36:53,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2967 transitions. [2021-06-05 14:36:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:53,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:53,067 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:53,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-06-05 14:36:53,268 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:53,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:53,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1031201196, now seen corresponding path program 205 times [2021-06-05 14:36:53,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:53,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887917947] [2021-06-05 14:36:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:53,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887917947] [2021-06-05 14:36:53,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887917947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67948367] [2021-06-05 14:36:53,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:53,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:53,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67948367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:53,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:53,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:53,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028612273] [2021-06-05 14:36:53,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:53,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:53,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:53,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:53,528 INFO L87 Difference]: Start difference. First operand 874 states and 2967 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:54,049 INFO L93 Difference]: Finished difference Result 1152 states and 3694 transitions. [2021-06-05 14:36:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:54,050 INFO L225 Difference]: With dead ends: 1152 [2021-06-05 14:36:54,050 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 14:36:54,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 527.0ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:36:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 14:36:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 887. [2021-06-05 14:36:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.393905191873589) internal successors, (3007), 886 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3007 transitions. [2021-06-05 14:36:54,061 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3007 transitions. Word has length 20 [2021-06-05 14:36:54,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:54,061 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3007 transitions. [2021-06-05 14:36:54,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3007 transitions. [2021-06-05 14:36:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:54,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:54,062 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:54,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-06-05 14:36:54,263 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:54,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:54,263 INFO L82 PathProgramCache]: Analyzing trace with hash 463211042, now seen corresponding path program 206 times [2021-06-05 14:36:54,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:54,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932967102] [2021-06-05 14:36:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:54,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:54,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932967102] [2021-06-05 14:36:54,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932967102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:54,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705390274] [2021-06-05 14:36:54,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:54,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:54,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:54,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:54,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:54,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705390274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:54,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:54,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:54,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039195516] [2021-06-05 14:36:54,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:54,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:54,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:54,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:54,487 INFO L87 Difference]: Start difference. First operand 887 states and 3007 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:55,346 INFO L93 Difference]: Finished difference Result 1414 states and 4369 transitions. [2021-06-05 14:36:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:36:55,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:55,348 INFO L225 Difference]: With dead ends: 1414 [2021-06-05 14:36:55,348 INFO L226 Difference]: Without dead ends: 1414 [2021-06-05 14:36:55,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 764.5ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:36:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-05 14:36:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 887. [2021-06-05 14:36:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.393905191873589) internal successors, (3007), 886 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3007 transitions. [2021-06-05 14:36:55,359 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3007 transitions. Word has length 20 [2021-06-05 14:36:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:55,359 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3007 transitions. [2021-06-05 14:36:55,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3007 transitions. [2021-06-05 14:36:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:55,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:55,360 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:55,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3328 [2021-06-05 14:36:55,561 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1030696680, now seen corresponding path program 207 times [2021-06-05 14:36:55,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:55,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532942863] [2021-06-05 14:36:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:55,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:55,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532942863] [2021-06-05 14:36:55,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532942863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:55,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954624772] [2021-06-05 14:36:55,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:55,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:36:55,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:55,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:55,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:55,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954624772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:55,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:55,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:36:55,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244762585] [2021-06-05 14:36:55,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:36:55,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:55,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:36:55,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:36:55,781 INFO L87 Difference]: Start difference. First operand 887 states and 3007 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:56,229 INFO L93 Difference]: Finished difference Result 1308 states and 4100 transitions. [2021-06-05 14:36:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:36:56,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:56,231 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 14:36:56,231 INFO L226 Difference]: Without dead ends: 1302 [2021-06-05 14:36:56,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:36:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-06-05 14:36:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 887. [2021-06-05 14:36:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.3905191873589167) internal successors, (3004), 886 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3004 transitions. [2021-06-05 14:36:56,241 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3004 transitions. Word has length 20 [2021-06-05 14:36:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:56,242 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3004 transitions. [2021-06-05 14:36:56,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3004 transitions. [2021-06-05 14:36:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:56,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:56,243 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:56,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:56,443 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:56,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:56,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1823327782, now seen corresponding path program 208 times [2021-06-05 14:36:56,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:56,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003262054] [2021-06-05 14:36:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:56,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:56,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003262054] [2021-06-05 14:36:56,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003262054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:56,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524415701] [2021-06-05 14:36:56,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:56,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:36:56,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:56,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524415701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:56,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:56,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:56,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9387871] [2021-06-05 14:36:56,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:56,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:56,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:56,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:56,704 INFO L87 Difference]: Start difference. First operand 887 states and 3004 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:57,065 INFO L93 Difference]: Finished difference Result 1115 states and 3617 transitions. [2021-06-05 14:36:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:57,065 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:57,066 INFO L225 Difference]: With dead ends: 1115 [2021-06-05 14:36:57,066 INFO L226 Difference]: Without dead ends: 1115 [2021-06-05 14:36:57,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-05 14:36:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 866. [2021-06-05 14:36:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.4057803468208094) internal successors, (2946), 865 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2946 transitions. [2021-06-05 14:36:57,076 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2946 transitions. Word has length 20 [2021-06-05 14:36:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:57,076 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2946 transitions. [2021-06-05 14:36:57,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2946 transitions. [2021-06-05 14:36:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:57,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:57,077 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:57,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3339 [2021-06-05 14:36:57,278 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:57,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:57,278 INFO L82 PathProgramCache]: Analyzing trace with hash 229814562, now seen corresponding path program 209 times [2021-06-05 14:36:57,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:57,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672474740] [2021-06-05 14:36:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:57,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:57,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672474740] [2021-06-05 14:36:57,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672474740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:57,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971876551] [2021-06-05 14:36:57,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:57,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:57,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:57,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:57,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:57,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971876551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:57,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:57,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:57,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928895690] [2021-06-05 14:36:57,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:57,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:57,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:57,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:57,533 INFO L87 Difference]: Start difference. First operand 866 states and 2946 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:57,852 INFO L93 Difference]: Finished difference Result 1035 states and 3386 transitions. [2021-06-05 14:36:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:36:57,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:57,853 INFO L225 Difference]: With dead ends: 1035 [2021-06-05 14:36:57,853 INFO L226 Difference]: Without dead ends: 1021 [2021-06-05 14:36:57,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:36:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-05 14:36:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 863. [2021-06-05 14:36:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4048723897911835) internal successors, (2935), 862 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2935 transitions. [2021-06-05 14:36:57,863 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2935 transitions. Word has length 20 [2021-06-05 14:36:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:57,863 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2935 transitions. [2021-06-05 14:36:57,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:57,863 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2935 transitions. [2021-06-05 14:36:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:57,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:57,864 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:58,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:58,064 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:58,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:58,064 INFO L82 PathProgramCache]: Analyzing trace with hash -688046316, now seen corresponding path program 210 times [2021-06-05 14:36:58,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:58,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558403356] [2021-06-05 14:36:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:58,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:58,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558403356] [2021-06-05 14:36:58,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558403356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:58,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303129631] [2021-06-05 14:36:58,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:58,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:36:58,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:58,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:58,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303129631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:58,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:58,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:58,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805220861] [2021-06-05 14:36:58,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:58,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:58,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:58,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:58,291 INFO L87 Difference]: Start difference. First operand 863 states and 2935 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:58,710 INFO L93 Difference]: Finished difference Result 1127 states and 3620 transitions. [2021-06-05 14:36:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:36:58,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:58,712 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 14:36:58,712 INFO L226 Difference]: Without dead ends: 1127 [2021-06-05 14:36:58,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:36:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-05 14:36:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 866. [2021-06-05 14:36:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.4023121387283237) internal successors, (2943), 865 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2943 transitions. [2021-06-05 14:36:58,728 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2943 transitions. Word has length 20 [2021-06-05 14:36:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:58,728 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2943 transitions. [2021-06-05 14:36:58,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2943 transitions. [2021-06-05 14:36:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:58,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:58,730 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:58,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3351 [2021-06-05 14:36:58,930 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:58,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:58,930 INFO L82 PathProgramCache]: Analyzing trace with hash 20311902, now seen corresponding path program 211 times [2021-06-05 14:36:58,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:58,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414725590] [2021-06-05 14:36:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:58,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:58,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414725590] [2021-06-05 14:36:58,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414725590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:58,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571072592] [2021-06-05 14:36:58,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:59,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:59,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:36:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:59,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571072592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:59,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:36:59,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:36:59,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446558792] [2021-06-05 14:36:59,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:36:59,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:36:59,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:36:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:36:59,161 INFO L87 Difference]: Start difference. First operand 866 states and 2943 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:36:59,579 INFO L93 Difference]: Finished difference Result 1165 states and 3732 transitions. [2021-06-05 14:36:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:36:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:36:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:36:59,581 INFO L225 Difference]: With dead ends: 1165 [2021-06-05 14:36:59,581 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 14:36:59,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:36:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 14:36:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 863. [2021-06-05 14:36:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4048723897911835) internal successors, (2935), 862 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2935 transitions. [2021-06-05 14:36:59,592 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2935 transitions. Word has length 20 [2021-06-05 14:36:59,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:36:59,592 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2935 transitions. [2021-06-05 14:36:59,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:36:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2935 transitions. [2021-06-05 14:36:59,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:36:59,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:36:59,593 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:36:59,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-06-05 14:36:59,793 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:36:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:36:59,793 INFO L82 PathProgramCache]: Analyzing trace with hash 714082840, now seen corresponding path program 212 times [2021-06-05 14:36:59,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:36:59,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164565231] [2021-06-05 14:36:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:36:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:36:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:36:59,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:36:59,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164565231] [2021-06-05 14:36:59,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164565231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:36:59,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186873506] [2021-06-05 14:36:59,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:36:59,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:36:59,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:36:59,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:36:59,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:00,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186873506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:00,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:00,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:00,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093530969] [2021-06-05 14:37:00,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:00,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:00,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:00,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:00,026 INFO L87 Difference]: Start difference. First operand 863 states and 2935 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:00,285 INFO L93 Difference]: Finished difference Result 1085 states and 3509 transitions. [2021-06-05 14:37:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:00,287 INFO L225 Difference]: With dead ends: 1085 [2021-06-05 14:37:00,287 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 14:37:00,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 14:37:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 882. [2021-06-05 14:37:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.401816118047673) internal successors, (2997), 881 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2997 transitions. [2021-06-05 14:37:00,297 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2997 transitions. Word has length 20 [2021-06-05 14:37:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:00,297 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2997 transitions. [2021-06-05 14:37:00,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2997 transitions. [2021-06-05 14:37:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:00,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:00,298 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:00,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:00,499 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:00,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:00,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1519520138, now seen corresponding path program 213 times [2021-06-05 14:37:00,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:00,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574825113] [2021-06-05 14:37:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:00,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:00,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574825113] [2021-06-05 14:37:00,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574825113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:00,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106777225] [2021-06-05 14:37:00,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:00,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:00,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:00,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:00,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:00,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106777225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:00,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:00,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:00,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806454902] [2021-06-05 14:37:00,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:00,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:00,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:00,742 INFO L87 Difference]: Start difference. First operand 882 states and 2997 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:01,116 INFO L93 Difference]: Finished difference Result 1168 states and 3719 transitions. [2021-06-05 14:37:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:01,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:01,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:01,117 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 14:37:01,117 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 14:37:01,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 14:37:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 882. [2021-06-05 14:37:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.401816118047673) internal successors, (2997), 881 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2997 transitions. [2021-06-05 14:37:01,127 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2997 transitions. Word has length 20 [2021-06-05 14:37:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:01,128 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2997 transitions. [2021-06-05 14:37:01,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2997 transitions. [2021-06-05 14:37:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:01,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:01,129 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:01,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-06-05 14:37:01,329 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:01,329 INFO L82 PathProgramCache]: Analyzing trace with hash 714587356, now seen corresponding path program 214 times [2021-06-05 14:37:01,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:01,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879424418] [2021-06-05 14:37:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:01,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:01,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879424418] [2021-06-05 14:37:01,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879424418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:01,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344875950] [2021-06-05 14:37:01,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:01,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:01,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:01,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344875950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:01,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:01,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:01,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240108800] [2021-06-05 14:37:01,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:01,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:01,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:01,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:01,593 INFO L87 Difference]: Start difference. First operand 882 states and 2997 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:02,024 INFO L93 Difference]: Finished difference Result 1181 states and 3743 transitions. [2021-06-05 14:37:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:02,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:02,025 INFO L225 Difference]: With dead ends: 1181 [2021-06-05 14:37:02,026 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 14:37:02,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 430.0ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 14:37:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 882. [2021-06-05 14:37:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.398410896708286) internal successors, (2994), 881 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2994 transitions. [2021-06-05 14:37:02,036 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2994 transitions. Word has length 20 [2021-06-05 14:37:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:02,036 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2994 transitions. [2021-06-05 14:37:02,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2994 transitions. [2021-06-05 14:37:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:02,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:02,037 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:02,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:02,237 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:02,237 INFO L82 PathProgramCache]: Analyzing trace with hash -726355478, now seen corresponding path program 215 times [2021-06-05 14:37:02,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:02,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003392560] [2021-06-05 14:37:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:02,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:02,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003392560] [2021-06-05 14:37:02,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003392560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:02,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535115067] [2021-06-05 14:37:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:02,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:02,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535115067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:02,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:02,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:02,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107311273] [2021-06-05 14:37:02,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:02,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:02,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:02,475 INFO L87 Difference]: Start difference. First operand 882 states and 2994 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:02,800 INFO L93 Difference]: Finished difference Result 1087 states and 3519 transitions. [2021-06-05 14:37:02,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:02,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:02,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:02,801 INFO L225 Difference]: With dead ends: 1087 [2021-06-05 14:37:02,802 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 14:37:02,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:02,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 14:37:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 879. [2021-06-05 14:37:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.4009111617312073) internal successors, (2986), 878 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2986 transitions. [2021-06-05 14:37:02,811 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2986 transitions. Word has length 20 [2021-06-05 14:37:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:02,811 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2986 transitions. [2021-06-05 14:37:02,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2986 transitions. [2021-06-05 14:37:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:02,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:02,812 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:03,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-06-05 14:37:03,017 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1252442934, now seen corresponding path program 216 times [2021-06-05 14:37:03,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:03,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795425705] [2021-06-05 14:37:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:03,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795425705] [2021-06-05 14:37:03,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795425705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306575216] [2021-06-05 14:37:03,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:03,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:03,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:03,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:03,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:03,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306575216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:03,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:03,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:03,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258738785] [2021-06-05 14:37:03,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:03,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:03,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:03,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:03,258 INFO L87 Difference]: Start difference. First operand 879 states and 2986 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:03,622 INFO L93 Difference]: Finished difference Result 1124 states and 3611 transitions. [2021-06-05 14:37:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:03,624 INFO L225 Difference]: With dead ends: 1124 [2021-06-05 14:37:03,624 INFO L226 Difference]: Without dead ends: 1112 [2021-06-05 14:37:03,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-06-05 14:37:03,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 879. [2021-06-05 14:37:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.39749430523918) internal successors, (2983), 878 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2983 transitions. [2021-06-05 14:37:03,634 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2983 transitions. Word has length 20 [2021-06-05 14:37:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:03,634 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2983 transitions. [2021-06-05 14:37:03,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2983 transitions. [2021-06-05 14:37:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:03,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:03,636 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:03,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:03,837 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1422441058, now seen corresponding path program 217 times [2021-06-05 14:37:03,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:03,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384597227] [2021-06-05 14:37:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:03,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:03,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384597227] [2021-06-05 14:37:03,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384597227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:03,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185460856] [2021-06-05 14:37:03,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:03,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:03,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:04,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185460856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:04,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:04,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:04,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080177444] [2021-06-05 14:37:04,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:04,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:04,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:04,092 INFO L87 Difference]: Start difference. First operand 879 states and 2983 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:04,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:04,348 INFO L93 Difference]: Finished difference Result 1048 states and 3432 transitions. [2021-06-05 14:37:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:04,349 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:04,351 INFO L225 Difference]: With dead ends: 1048 [2021-06-05 14:37:04,351 INFO L226 Difference]: Without dead ends: 1048 [2021-06-05 14:37:04,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:04,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-05 14:37:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 860. [2021-06-05 14:37:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4074505238649593) internal successors, (2927), 859 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2927 transitions. [2021-06-05 14:37:04,362 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2927 transitions. Word has length 20 [2021-06-05 14:37:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:04,362 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2927 transitions. [2021-06-05 14:37:04,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2927 transitions. [2021-06-05 14:37:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:04,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:04,363 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:04,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3380,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:04,564 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:04,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2092510764, now seen corresponding path program 218 times [2021-06-05 14:37:04,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:04,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625802550] [2021-06-05 14:37:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:04,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:04,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625802550] [2021-06-05 14:37:04,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625802550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:04,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480072791] [2021-06-05 14:37:04,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:04,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:04,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:04,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:04,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:04,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480072791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:04,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:04,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:37:04,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996252497] [2021-06-05 14:37:04,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:04,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:04,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:04,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:04,804 INFO L87 Difference]: Start difference. First operand 860 states and 2927 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:05,207 INFO L93 Difference]: Finished difference Result 1395 states and 4367 transitions. [2021-06-05 14:37:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:05,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:05,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:05,209 INFO L225 Difference]: With dead ends: 1395 [2021-06-05 14:37:05,209 INFO L226 Difference]: Without dead ends: 1395 [2021-06-05 14:37:05,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-06-05 14:37:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 872. [2021-06-05 14:37:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.407577497129736) internal successors, (2968), 871 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2968 transitions. [2021-06-05 14:37:05,219 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2968 transitions. Word has length 20 [2021-06-05 14:37:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:05,220 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2968 transitions. [2021-06-05 14:37:05,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2968 transitions. [2021-06-05 14:37:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:05,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:05,221 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:05,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3382 [2021-06-05 14:37:05,421 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:05,421 INFO L82 PathProgramCache]: Analyzing trace with hash -644245470, now seen corresponding path program 219 times [2021-06-05 14:37:05,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:05,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985337082] [2021-06-05 14:37:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:05,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:05,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985337082] [2021-06-05 14:37:05,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985337082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:05,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951817996] [2021-06-05 14:37:05,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:05,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:05,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:05,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:05,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:05,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951817996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:05,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:05,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:05,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123124557] [2021-06-05 14:37:05,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:05,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:05,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:05,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:05,697 INFO L87 Difference]: Start difference. First operand 872 states and 2968 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:06,252 INFO L93 Difference]: Finished difference Result 1447 states and 4500 transitions. [2021-06-05 14:37:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:06,253 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:06,254 INFO L225 Difference]: With dead ends: 1447 [2021-06-05 14:37:06,254 INFO L226 Difference]: Without dead ends: 1447 [2021-06-05 14:37:06,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 536.7ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-06-05 14:37:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 878. [2021-06-05 14:37:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.4059293044469783) internal successors, (2987), 877 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2987 transitions. [2021-06-05 14:37:06,272 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2987 transitions. Word has length 20 [2021-06-05 14:37:06,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:06,273 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2987 transitions. [2021-06-05 14:37:06,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:06,273 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2987 transitions. [2021-06-05 14:37:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:06,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:06,274 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:06,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-06-05 14:37:06,474 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:06,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1430299490, now seen corresponding path program 220 times [2021-06-05 14:37:06,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:06,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905864603] [2021-06-05 14:37:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:06,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:06,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905864603] [2021-06-05 14:37:06,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905864603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:06,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551871365] [2021-06-05 14:37:06,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:06,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:06,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:06,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:06,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:06,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551871365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:06,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:06,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:06,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581673280] [2021-06-05 14:37:06,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:06,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:06,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:06,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:06,777 INFO L87 Difference]: Start difference. First operand 878 states and 2987 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:07,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:07,488 INFO L93 Difference]: Finished difference Result 1298 states and 4097 transitions. [2021-06-05 14:37:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:07,488 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:07,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:07,489 INFO L225 Difference]: With dead ends: 1298 [2021-06-05 14:37:07,489 INFO L226 Difference]: Without dead ends: 1291 [2021-06-05 14:37:07,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 732.3ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:37:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-05 14:37:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 891. [2021-06-05 14:37:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.401123595505618) internal successors, (3027), 890 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3027 transitions. [2021-06-05 14:37:07,501 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3027 transitions. Word has length 20 [2021-06-05 14:37:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:07,501 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3027 transitions. [2021-06-05 14:37:07,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3027 transitions. [2021-06-05 14:37:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:07,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:07,502 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:07,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-06-05 14:37:07,702 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash 64112748, now seen corresponding path program 221 times [2021-06-05 14:37:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:07,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043216037] [2021-06-05 14:37:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:07,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:07,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043216037] [2021-06-05 14:37:07,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043216037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:07,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823144765] [2021-06-05 14:37:07,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:07,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:07,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:07,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:08,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823144765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:08,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:08,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:08,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571140758] [2021-06-05 14:37:08,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:08,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:08,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:08,038 INFO L87 Difference]: Start difference. First operand 891 states and 3027 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:09,051 INFO L93 Difference]: Finished difference Result 1575 states and 4819 transitions. [2021-06-05 14:37:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:37:09,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:09,053 INFO L225 Difference]: With dead ends: 1575 [2021-06-05 14:37:09,053 INFO L226 Difference]: Without dead ends: 1575 [2021-06-05 14:37:09,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 958.8ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:37:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-06-05 14:37:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 894. [2021-06-05 14:37:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.4053751399776035) internal successors, (3041), 893 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3041 transitions. [2021-06-05 14:37:09,069 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3041 transitions. Word has length 20 [2021-06-05 14:37:09,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:09,070 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 3041 transitions. [2021-06-05 14:37:09,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3041 transitions. [2021-06-05 14:37:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:09,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:09,071 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:09,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:09,289 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1429794974, now seen corresponding path program 222 times [2021-06-05 14:37:09,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:09,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503422739] [2021-06-05 14:37:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:09,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:09,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503422739] [2021-06-05 14:37:09,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503422739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:09,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276711789] [2021-06-05 14:37:09,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:09,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:37:09,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:09,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:09,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:09,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276711789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:09,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:09,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:09,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667532342] [2021-06-05 14:37:09,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:09,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:09,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:09,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:09,581 INFO L87 Difference]: Start difference. First operand 894 states and 3041 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:10,115 INFO L93 Difference]: Finished difference Result 1469 states and 4544 transitions. [2021-06-05 14:37:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:10,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:10,117 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 14:37:10,117 INFO L226 Difference]: Without dead ends: 1463 [2021-06-05 14:37:10,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:10,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-05 14:37:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 900. [2021-06-05 14:37:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.3937708565072304) internal successors, (3051), 899 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3051 transitions. [2021-06-05 14:37:10,129 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3051 transitions. Word has length 20 [2021-06-05 14:37:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:10,129 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3051 transitions. [2021-06-05 14:37:10,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3051 transitions. [2021-06-05 14:37:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:10,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:10,130 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:10,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3408 [2021-06-05 14:37:10,330 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:10,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:10,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1424229488, now seen corresponding path program 223 times [2021-06-05 14:37:10,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:10,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085811460] [2021-06-05 14:37:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:10,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:10,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085811460] [2021-06-05 14:37:10,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085811460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:10,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338224200] [2021-06-05 14:37:10,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:10,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:10,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338224200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:10,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:10,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:10,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754972180] [2021-06-05 14:37:10,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:10,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:10,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:10,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:10,677 INFO L87 Difference]: Start difference. First operand 900 states and 3051 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:10,887 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-06-05 14:37:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:11,262 INFO L93 Difference]: Finished difference Result 1270 states and 4047 transitions. [2021-06-05 14:37:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:11,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:11,264 INFO L225 Difference]: With dead ends: 1270 [2021-06-05 14:37:11,264 INFO L226 Difference]: Without dead ends: 1270 [2021-06-05 14:37:11,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 655.2ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-06-05 14:37:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 879. [2021-06-05 14:37:11,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.408883826879271) internal successors, (2993), 878 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2993 transitions. [2021-06-05 14:37:11,275 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2993 transitions. Word has length 20 [2021-06-05 14:37:11,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:11,275 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2993 transitions. [2021-06-05 14:37:11,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:11,275 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2993 transitions. [2021-06-05 14:37:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:11,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:11,276 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:11,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3416 [2021-06-05 14:37:11,476 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:11,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1979263942, now seen corresponding path program 224 times [2021-06-05 14:37:11,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:11,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103302534] [2021-06-05 14:37:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:11,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:11,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103302534] [2021-06-05 14:37:11,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103302534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:11,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117808885] [2021-06-05 14:37:11,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:11,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:11,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:11,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:11,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117808885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:11,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:11,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:11,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421998820] [2021-06-05 14:37:11,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:11,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:11,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:11,752 INFO L87 Difference]: Start difference. First operand 879 states and 2993 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:12,295 INFO L93 Difference]: Finished difference Result 1202 states and 3860 transitions. [2021-06-05 14:37:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:12,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:12,297 INFO L225 Difference]: With dead ends: 1202 [2021-06-05 14:37:12,297 INFO L226 Difference]: Without dead ends: 1177 [2021-06-05 14:37:12,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-05 14:37:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 883. [2021-06-05 14:37:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 3.4047619047619047) internal successors, (3003), 882 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 3003 transitions. [2021-06-05 14:37:12,314 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 3003 transitions. Word has length 20 [2021-06-05 14:37:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:12,314 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 3003 transitions. [2021-06-05 14:37:12,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 3003 transitions. [2021-06-05 14:37:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:12,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:12,315 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:12,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-06-05 14:37:12,516 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:12,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1661141342, now seen corresponding path program 225 times [2021-06-05 14:37:12,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:12,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886699554] [2021-06-05 14:37:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:12,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:12,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886699554] [2021-06-05 14:37:12,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886699554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:12,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122773372] [2021-06-05 14:37:12,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:12,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:12,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:12,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:12,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:12,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122773372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:12,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:12,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:37:12,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137795163] [2021-06-05 14:37:12,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:12,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:12,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:12,761 INFO L87 Difference]: Start difference. First operand 883 states and 3003 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:13,128 INFO L93 Difference]: Finished difference Result 1332 states and 4235 transitions. [2021-06-05 14:37:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:13,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:13,130 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 14:37:13,130 INFO L226 Difference]: Without dead ends: 1332 [2021-06-05 14:37:13,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:37:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-06-05 14:37:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 870. [2021-06-05 14:37:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4073647871116224) internal successors, (2961), 869 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2961 transitions. [2021-06-05 14:37:13,142 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2961 transitions. Word has length 20 [2021-06-05 14:37:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:13,143 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2961 transitions. [2021-06-05 14:37:13,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2961 transitions. [2021-06-05 14:37:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:13,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:13,144 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:13,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3434,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:13,344 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:13,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1718811554, now seen corresponding path program 226 times [2021-06-05 14:37:13,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:13,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183350416] [2021-06-05 14:37:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:13,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183350416] [2021-06-05 14:37:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183350416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:13,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488520903] [2021-06-05 14:37:13,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:13,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:13,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:13,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:13,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488520903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:13,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:13,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:13,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672223494] [2021-06-05 14:37:13,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:13,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:13,601 INFO L87 Difference]: Start difference. First operand 870 states and 2961 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:14,011 INFO L93 Difference]: Finished difference Result 1256 states and 4050 transitions. [2021-06-05 14:37:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:14,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:14,013 INFO L225 Difference]: With dead ends: 1256 [2021-06-05 14:37:14,013 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 14:37:14,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:37:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 14:37:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 873. [2021-06-05 14:37:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.4128440366972477) internal successors, (2976), 872 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-06-05 14:37:14,023 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-06-05 14:37:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:14,024 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-06-05 14:37:14,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-06-05 14:37:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:14,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:14,025 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:14,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3438,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:14,225 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash 951965406, now seen corresponding path program 227 times [2021-06-05 14:37:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:14,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065501189] [2021-06-05 14:37:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:14,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:14,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065501189] [2021-06-05 14:37:14,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065501189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:14,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851683599] [2021-06-05 14:37:14,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:14,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:14,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:14,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:14,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:14,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851683599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:14,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:14,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:14,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242180375] [2021-06-05 14:37:14,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:14,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:14,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:14,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:14,493 INFO L87 Difference]: Start difference. First operand 873 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:14,927 INFO L93 Difference]: Finished difference Result 1288 states and 4131 transitions. [2021-06-05 14:37:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:14,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:14,929 INFO L225 Difference]: With dead ends: 1288 [2021-06-05 14:37:14,929 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 14:37:14,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:37:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 14:37:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 874. [2021-06-05 14:37:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.415807560137457) internal successors, (2982), 873 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-06-05 14:37:14,940 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-06-05 14:37:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:14,940 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-06-05 14:37:14,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-06-05 14:37:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:14,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:14,941 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:15,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:15,142 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:15,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1005171550, now seen corresponding path program 228 times [2021-06-05 14:37:15,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:15,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15487252] [2021-06-05 14:37:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:15,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:15,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15487252] [2021-06-05 14:37:15,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15487252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:15,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063181611] [2021-06-05 14:37:15,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:15,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:15,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:15,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:15,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063181611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:15,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:15,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:37:15,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945869061] [2021-06-05 14:37:15,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:15,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:15,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:15,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:15,436 INFO L87 Difference]: Start difference. First operand 874 states and 2982 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:15,835 INFO L93 Difference]: Finished difference Result 1255 states and 4054 transitions. [2021-06-05 14:37:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:15,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:15,837 INFO L225 Difference]: With dead ends: 1255 [2021-06-05 14:37:15,837 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 14:37:15,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:37:15,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 14:37:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 873. [2021-06-05 14:37:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.4128440366972477) internal successors, (2976), 872 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-06-05 14:37:15,847 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-06-05 14:37:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:15,847 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-06-05 14:37:15,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-06-05 14:37:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:15,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:15,848 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:16,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3450 [2021-06-05 14:37:16,049 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:16,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1815112108, now seen corresponding path program 229 times [2021-06-05 14:37:16,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:16,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248636531] [2021-06-05 14:37:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:16,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:16,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248636531] [2021-06-05 14:37:16,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248636531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:16,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717739055] [2021-06-05 14:37:16,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:16,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:16,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:16,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717739055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:16,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:16,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:16,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59600745] [2021-06-05 14:37:16,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:16,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:16,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:16,333 INFO L87 Difference]: Start difference. First operand 873 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:16,909 INFO L93 Difference]: Finished difference Result 1327 states and 4214 transitions. [2021-06-05 14:37:16,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:16,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:16,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:16,911 INFO L225 Difference]: With dead ends: 1327 [2021-06-05 14:37:16,911 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 14:37:16,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 510.8ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 14:37:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 880. [2021-06-05 14:37:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4141069397042094) internal successors, (3001), 879 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-06-05 14:37:16,922 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-06-05 14:37:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:16,922 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-06-05 14:37:16,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-06-05 14:37:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:16,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:16,923 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:17,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3457,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:17,124 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:17,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:17,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1693801168, now seen corresponding path program 230 times [2021-06-05 14:37:17,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:17,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987894331] [2021-06-05 14:37:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:17,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:17,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987894331] [2021-06-05 14:37:17,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987894331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:17,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626107841] [2021-06-05 14:37:17,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:17,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:17,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:17,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:17,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:17,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626107841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:17,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:17,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:17,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908254410] [2021-06-05 14:37:17,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:17,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:17,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:17,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:17,455 INFO L87 Difference]: Start difference. First operand 880 states and 3001 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:18,421 INFO L93 Difference]: Finished difference Result 1319 states and 4148 transitions. [2021-06-05 14:37:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:18,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:18,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:18,423 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 14:37:18,423 INFO L226 Difference]: Without dead ends: 1312 [2021-06-05 14:37:18,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 969.2ms TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:18,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-06-05 14:37:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 893. [2021-06-05 14:37:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4091928251121075) internal successors, (3041), 892 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3041 transitions. [2021-06-05 14:37:18,435 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3041 transitions. Word has length 20 [2021-06-05 14:37:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:18,435 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3041 transitions. [2021-06-05 14:37:18,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3041 transitions. [2021-06-05 14:37:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:18,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:18,437 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:18,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3462 [2021-06-05 14:37:18,637 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:18,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1106753890, now seen corresponding path program 231 times [2021-06-05 14:37:18,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:18,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854358384] [2021-06-05 14:37:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:18,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:18,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854358384] [2021-06-05 14:37:18,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854358384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:18,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768629561] [2021-06-05 14:37:18,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:18,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:18,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:18,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:18,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768629561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:18,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:18,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:18,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812973420] [2021-06-05 14:37:18,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:18,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:18,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:18,923 INFO L87 Difference]: Start difference. First operand 893 states and 3041 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:19,943 INFO L93 Difference]: Finished difference Result 1513 states and 4641 transitions. [2021-06-05 14:37:19,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:37:19,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:19,945 INFO L225 Difference]: With dead ends: 1513 [2021-06-05 14:37:19,945 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 14:37:19,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 941.5ms TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:37:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 14:37:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 896. [2021-06-05 14:37:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.4134078212290504) internal successors, (3055), 895 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3055 transitions. [2021-06-05 14:37:19,957 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3055 transitions. Word has length 20 [2021-06-05 14:37:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:19,957 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 3055 transitions. [2021-06-05 14:37:19,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3055 transitions. [2021-06-05 14:37:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:19,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:19,958 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:20,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3473 [2021-06-05 14:37:20,158 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1694305684, now seen corresponding path program 232 times [2021-06-05 14:37:20,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:20,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252708217] [2021-06-05 14:37:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:20,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:20,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252708217] [2021-06-05 14:37:20,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252708217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:20,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328093761] [2021-06-05 14:37:20,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:20,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:20,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:20,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:20,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328093761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:20,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:20,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:20,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367522736] [2021-06-05 14:37:20,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:20,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:20,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:20,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:20,438 INFO L87 Difference]: Start difference. First operand 896 states and 3055 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:20,972 INFO L93 Difference]: Finished difference Result 1391 states and 4357 transitions. [2021-06-05 14:37:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:20,973 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:20,974 INFO L225 Difference]: With dead ends: 1391 [2021-06-05 14:37:20,974 INFO L226 Difference]: Without dead ends: 1385 [2021-06-05 14:37:20,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-05 14:37:20,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 902. [2021-06-05 14:37:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.4017758046614874) internal successors, (3065), 901 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3065 transitions. [2021-06-05 14:37:20,987 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3065 transitions. Word has length 20 [2021-06-05 14:37:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:20,987 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3065 transitions. [2021-06-05 14:37:20,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3065 transitions. [2021-06-05 14:37:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:20,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:20,988 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:21,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:21,188 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:21,188 INFO L82 PathProgramCache]: Analyzing trace with hash 253362850, now seen corresponding path program 233 times [2021-06-05 14:37:21,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:21,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334875358] [2021-06-05 14:37:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:21,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:21,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334875358] [2021-06-05 14:37:21,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334875358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:21,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018699968] [2021-06-05 14:37:21,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:21,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:21,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:21,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:21,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018699968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:21,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:21,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:21,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433282516] [2021-06-05 14:37:21,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:21,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:21,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:21,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:21,531 INFO L87 Difference]: Start difference. First operand 902 states and 3065 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:22,195 INFO L93 Difference]: Finished difference Result 1244 states and 3987 transitions. [2021-06-05 14:37:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:22,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:22,197 INFO L225 Difference]: With dead ends: 1244 [2021-06-05 14:37:22,197 INFO L226 Difference]: Without dead ends: 1244 [2021-06-05 14:37:22,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 675.4ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:37:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-05 14:37:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 886. [2021-06-05 14:37:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4124293785310735) internal successors, (3020), 885 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-06-05 14:37:22,207 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-06-05 14:37:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:22,208 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-06-05 14:37:22,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-06-05 14:37:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:22,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:22,209 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:22,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3485 [2021-06-05 14:37:22,412 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:22,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1018215370, now seen corresponding path program 234 times [2021-06-05 14:37:22,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:22,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523116864] [2021-06-05 14:37:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:22,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:22,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523116864] [2021-06-05 14:37:22,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523116864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:22,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016184716] [2021-06-05 14:37:22,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:22,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:22,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:22,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016184716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:22,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:22,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:22,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827658219] [2021-06-05 14:37:22,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:22,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:22,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:22,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:22,735 INFO L87 Difference]: Start difference. First operand 886 states and 3020 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:23,576 INFO L93 Difference]: Finished difference Result 1215 states and 3915 transitions. [2021-06-05 14:37:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:23,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:23,578 INFO L225 Difference]: With dead ends: 1215 [2021-06-05 14:37:23,578 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 14:37:23,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 836.3ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:23,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 14:37:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 886. [2021-06-05 14:37:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4124293785310735) internal successors, (3020), 885 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-06-05 14:37:23,588 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-06-05 14:37:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:23,588 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-06-05 14:37:23,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-06-05 14:37:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:23,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:23,589 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:23,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3497,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:23,790 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:23,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:23,790 INFO L82 PathProgramCache]: Analyzing trace with hash 641912734, now seen corresponding path program 235 times [2021-06-05 14:37:23,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:23,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230782507] [2021-06-05 14:37:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:23,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:23,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230782507] [2021-06-05 14:37:23,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230782507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:23,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502635483] [2021-06-05 14:37:23,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:23,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:23,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502635483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:24,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:24,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:37:24,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919119885] [2021-06-05 14:37:24,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:24,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:24,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:24,165 INFO L87 Difference]: Start difference. First operand 886 states and 3020 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:24,633 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-06-05 14:37:24,876 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-05 14:37:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:25,093 INFO L93 Difference]: Finished difference Result 1168 states and 3814 transitions. [2021-06-05 14:37:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:25,095 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 14:37:25,095 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 14:37:25,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 971.4ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 14:37:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 886. [2021-06-05 14:37:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4124293785310735) internal successors, (3020), 885 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-06-05 14:37:25,105 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-06-05 14:37:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:25,105 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-06-05 14:37:25,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-06-05 14:37:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:25,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:25,106 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:25,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3507 [2021-06-05 14:37:25,307 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:25,307 INFO L82 PathProgramCache]: Analyzing trace with hash 3464990, now seen corresponding path program 236 times [2021-06-05 14:37:25,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:25,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165108335] [2021-06-05 14:37:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:25,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:25,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165108335] [2021-06-05 14:37:25,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165108335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:25,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284178059] [2021-06-05 14:37:25,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:25,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:25,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:25,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:25,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:25,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284178059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:25,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:25,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:25,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869172238] [2021-06-05 14:37:25,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:25,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:25,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:25,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:25,633 INFO L87 Difference]: Start difference. First operand 886 states and 3020 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:26,176 INFO L93 Difference]: Finished difference Result 1230 states and 3981 transitions. [2021-06-05 14:37:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:26,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:26,177 INFO L225 Difference]: With dead ends: 1230 [2021-06-05 14:37:26,178 INFO L226 Difference]: Without dead ends: 1230 [2021-06-05 14:37:26,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:26,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-05 14:37:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 876. [2021-06-05 14:37:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.418285714285714) internal successors, (2991), 875 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2991 transitions. [2021-06-05 14:37:26,188 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2991 transitions. Word has length 20 [2021-06-05 14:37:26,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:26,188 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2991 transitions. [2021-06-05 14:37:26,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2991 transitions. [2021-06-05 14:37:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:26,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:26,189 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:26,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3517,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:26,389 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:26,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231070, now seen corresponding path program 237 times [2021-06-05 14:37:26,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:26,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383936564] [2021-06-05 14:37:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:26,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:26,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383936564] [2021-06-05 14:37:26,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383936564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:26,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915086527] [2021-06-05 14:37:26,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:26,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:26,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:26,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:26,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:26,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915086527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:26,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:26,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:26,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764124788] [2021-06-05 14:37:26,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:26,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:26,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:26,682 INFO L87 Difference]: Start difference. First operand 876 states and 2991 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:27,326 INFO L93 Difference]: Finished difference Result 1261 states and 4066 transitions. [2021-06-05 14:37:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:27,328 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 14:37:27,328 INFO L226 Difference]: Without dead ends: 1261 [2021-06-05 14:37:27,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-06-05 14:37:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 877. [2021-06-05 14:37:27,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.421232876712329) internal successors, (2997), 876 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2997 transitions. [2021-06-05 14:37:27,338 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2997 transitions. Word has length 20 [2021-06-05 14:37:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:27,339 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2997 transitions. [2021-06-05 14:37:27,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2997 transitions. [2021-06-05 14:37:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:27,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:27,340 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:27,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3523 [2021-06-05 14:37:27,540 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:27,540 INFO L82 PathProgramCache]: Analyzing trace with hash -770905886, now seen corresponding path program 238 times [2021-06-05 14:37:27,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:27,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263162115] [2021-06-05 14:37:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:27,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:27,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263162115] [2021-06-05 14:37:27,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263162115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:27,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511723559] [2021-06-05 14:37:27,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:27,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:27,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:27,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:27,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:27,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511723559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:27,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:27,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:37:27,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166434414] [2021-06-05 14:37:27,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:27,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:27,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:27,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:27,828 INFO L87 Difference]: Start difference. First operand 877 states and 2997 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:28,452 INFO L93 Difference]: Finished difference Result 1218 states and 3963 transitions. [2021-06-05 14:37:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:28,454 INFO L225 Difference]: With dead ends: 1218 [2021-06-05 14:37:28,454 INFO L226 Difference]: Without dead ends: 1218 [2021-06-05 14:37:28,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 583.5ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-06-05 14:37:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 873. [2021-06-05 14:37:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.4128440366972477) internal successors, (2976), 872 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-06-05 14:37:28,465 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-06-05 14:37:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:28,465 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-06-05 14:37:28,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-06-05 14:37:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:28,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:28,466 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:28,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3529,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:28,666 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:28,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:28,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1170147038, now seen corresponding path program 239 times [2021-06-05 14:37:28,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:28,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554389614] [2021-06-05 14:37:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:28,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:28,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554389614] [2021-06-05 14:37:28,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554389614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:28,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885312377] [2021-06-05 14:37:28,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:28,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:28,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:28,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:28,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:29,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885312377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:29,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:29,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:29,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597973261] [2021-06-05 14:37:29,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:29,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:29,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:29,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:29,029 INFO L87 Difference]: Start difference. First operand 873 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:30,077 INFO L93 Difference]: Finished difference Result 1333 states and 4195 transitions. [2021-06-05 14:37:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:37:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:30,078 INFO L225 Difference]: With dead ends: 1333 [2021-06-05 14:37:30,079 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 14:37:30,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1037.5ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:37:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 14:37:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 888. [2021-06-05 14:37:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4137542277339348) internal successors, (3028), 887 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3028 transitions. [2021-06-05 14:37:30,090 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3028 transitions. Word has length 20 [2021-06-05 14:37:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:30,090 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3028 transitions. [2021-06-05 14:37:30,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3028 transitions. [2021-06-05 14:37:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:30,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:30,091 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:30,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3536 [2021-06-05 14:37:30,291 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:30,292 INFO L82 PathProgramCache]: Analyzing trace with hash 324265200, now seen corresponding path program 240 times [2021-06-05 14:37:30,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:30,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119775910] [2021-06-05 14:37:30,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:30,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:30,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119775910] [2021-06-05 14:37:30,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119775910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:30,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035106804] [2021-06-05 14:37:30,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:30,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:30,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:30,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:30,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035106804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:30,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:30,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:30,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446875148] [2021-06-05 14:37:30,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:30,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:30,570 INFO L87 Difference]: Start difference. First operand 888 states and 3028 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:31,513 INFO L93 Difference]: Finished difference Result 1481 states and 4564 transitions. [2021-06-05 14:37:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:37:31,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:31,515 INFO L225 Difference]: With dead ends: 1481 [2021-06-05 14:37:31,515 INFO L226 Difference]: Without dead ends: 1481 [2021-06-05 14:37:31,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 872.6ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:37:31,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-05 14:37:31,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 892. [2021-06-05 14:37:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.420875420875421) internal successors, (3048), 891 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-06-05 14:37:31,527 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-06-05 14:37:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:31,528 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-06-05 14:37:31,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-06-05 14:37:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:31,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:31,529 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:31,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3544 [2021-06-05 14:37:31,729 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1169642522, now seen corresponding path program 241 times [2021-06-05 14:37:31,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:31,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551025833] [2021-06-05 14:37:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:31,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551025833] [2021-06-05 14:37:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551025833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:31,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744614233] [2021-06-05 14:37:31,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:31,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:31,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:31,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744614233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:31,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:31,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:31,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198929945] [2021-06-05 14:37:31,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:31,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:31,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:31,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:31,996 INFO L87 Difference]: Start difference. First operand 892 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,602 INFO L93 Difference]: Finished difference Result 1429 states and 4457 transitions. [2021-06-05 14:37:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:32,602 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:32,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,604 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 14:37:32,604 INFO L226 Difference]: Without dead ends: 1423 [2021-06-05 14:37:32,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:32,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-06-05 14:37:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 898. [2021-06-05 14:37:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4091415830546263) internal successors, (3058), 897 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3058 transitions. [2021-06-05 14:37:32,615 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3058 transitions. Word has length 20 [2021-06-05 14:37:32,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,615 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3058 transitions. [2021-06-05 14:37:32,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3058 transitions. [2021-06-05 14:37:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:32,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,623 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:32,824 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1684381940, now seen corresponding path program 242 times [2021-06-05 14:37:32,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759138957] [2021-06-05 14:37:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759138957] [2021-06-05 14:37:32,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759138957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356962412] [2021-06-05 14:37:32,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:32,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:32,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:32,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:32,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:33,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356962412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:33,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:33,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:33,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068896341] [2021-06-05 14:37:33,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:33,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:33,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:33,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:33,137 INFO L87 Difference]: Start difference. First operand 898 states and 3058 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:34,050 INFO L93 Difference]: Finished difference Result 1305 states and 4149 transitions. [2021-06-05 14:37:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:34,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:34,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:34,052 INFO L225 Difference]: With dead ends: 1305 [2021-06-05 14:37:34,052 INFO L226 Difference]: Without dead ends: 1305 [2021-06-05 14:37:34,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-06-05 14:37:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 895. [2021-06-05 14:37:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.411633109619687) internal successors, (3050), 894 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3050 transitions. [2021-06-05 14:37:34,063 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3050 transitions. Word has length 20 [2021-06-05 14:37:34,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:34,064 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3050 transitions. [2021-06-05 14:37:34,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:34,064 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3050 transitions. [2021-06-05 14:37:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:34,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:34,065 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:34,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-05 14:37:34,265 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1939683514, now seen corresponding path program 243 times [2021-06-05 14:37:34,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:34,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612347760] [2021-06-05 14:37:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:34,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:34,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612347760] [2021-06-05 14:37:34,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612347760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:34,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49255968] [2021-06-05 14:37:34,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:34,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:34,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:34,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:34,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:34,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49255968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:34,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:34,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:34,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866660213] [2021-06-05 14:37:34,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:34,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:34,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:34,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:34,597 INFO L87 Difference]: Start difference. First operand 895 states and 3050 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:35,657 INFO L93 Difference]: Finished difference Result 1292 states and 4096 transitions. [2021-06-05 14:37:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:35,659 INFO L225 Difference]: With dead ends: 1292 [2021-06-05 14:37:35,659 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 14:37:35,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1029.1ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:35,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 14:37:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 899. [2021-06-05 14:37:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.4120267260579062) internal successors, (3064), 898 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3064 transitions. [2021-06-05 14:37:35,671 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3064 transitions. Word has length 20 [2021-06-05 14:37:35,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:35,671 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3064 transitions. [2021-06-05 14:37:35,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,671 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3064 transitions. [2021-06-05 14:37:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:35,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:35,672 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:35,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:35,872 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:35,872 INFO L82 PathProgramCache]: Analyzing trace with hash 12619042, now seen corresponding path program 244 times [2021-06-05 14:37:35,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:35,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741261589] [2021-06-05 14:37:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:35,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:35,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741261589] [2021-06-05 14:37:35,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741261589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:35,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867686321] [2021-06-05 14:37:35,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:36,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:36,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:36,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:36,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:36,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867686321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:36,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:36,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:37:36,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758832027] [2021-06-05 14:37:36,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:36,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:36,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:36,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:36,247 INFO L87 Difference]: Start difference. First operand 899 states and 3064 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:37,258 INFO L93 Difference]: Finished difference Result 1226 states and 3964 transitions. [2021-06-05 14:37:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:37,259 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:37,260 INFO L225 Difference]: With dead ends: 1226 [2021-06-05 14:37:37,260 INFO L226 Difference]: Without dead ends: 1226 [2021-06-05 14:37:37,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1036.9ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-06-05 14:37:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 897. [2021-06-05 14:37:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4140625) internal successors, (3059), 896 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3059 transitions. [2021-06-05 14:37:37,276 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3059 transitions. Word has length 20 [2021-06-05 14:37:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:37,276 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3059 transitions. [2021-06-05 14:37:37,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3059 transitions. [2021-06-05 14:37:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:37,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:37,277 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:37,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3579,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:37,478 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1075665638, now seen corresponding path program 245 times [2021-06-05 14:37:37,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:37,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164193120] [2021-06-05 14:37:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:37,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:37,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164193120] [2021-06-05 14:37:37,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164193120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:37,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665983536] [2021-06-05 14:37:37,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:37,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:37,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:37,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:37,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665983536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:37,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:37,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:37,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474280714] [2021-06-05 14:37:37,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:37,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:37,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:37,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:37,754 INFO L87 Difference]: Start difference. First operand 897 states and 3059 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:38,565 INFO L93 Difference]: Finished difference Result 1318 states and 4204 transitions. [2021-06-05 14:37:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:38,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:38,567 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 14:37:38,567 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 14:37:38,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 734.1ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 14:37:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 888. [2021-06-05 14:37:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.41826381059752) internal successors, (3032), 887 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3032 transitions. [2021-06-05 14:37:38,577 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3032 transitions. Word has length 20 [2021-06-05 14:37:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:38,577 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3032 transitions. [2021-06-05 14:37:38,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3032 transitions. [2021-06-05 14:37:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:38,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:38,578 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:38,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3592,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:38,779 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1926959258, now seen corresponding path program 246 times [2021-06-05 14:37:38,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:38,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443662072] [2021-06-05 14:37:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:38,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:38,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443662072] [2021-06-05 14:37:38,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443662072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:38,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198601861] [2021-06-05 14:37:38,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:38,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:38,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:38,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:39,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198601861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:39,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:39,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:37:39,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200009874] [2021-06-05 14:37:39,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:39,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:39,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:39,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:39,065 INFO L87 Difference]: Start difference. First operand 888 states and 3032 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:39,861 INFO L93 Difference]: Finished difference Result 1287 states and 4137 transitions. [2021-06-05 14:37:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:39,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:39,862 INFO L225 Difference]: With dead ends: 1287 [2021-06-05 14:37:39,862 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 14:37:39,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 738.3ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:37:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 14:37:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 887. [2021-06-05 14:37:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.415349887133183) internal successors, (3026), 886 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3026 transitions. [2021-06-05 14:37:39,873 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3026 transitions. Word has length 20 [2021-06-05 14:37:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:39,873 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3026 transitions. [2021-06-05 14:37:39,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3026 transitions. [2021-06-05 14:37:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:39,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:39,874 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:40,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:40,075 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:40,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1096402166, now seen corresponding path program 247 times [2021-06-05 14:37:40,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:40,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404539385] [2021-06-05 14:37:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:40,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:40,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404539385] [2021-06-05 14:37:40,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404539385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:40,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934941583] [2021-06-05 14:37:40,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:40,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:40,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934941583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:40,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:40,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865658375] [2021-06-05 14:37:40,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:40,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:40,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:40,347 INFO L87 Difference]: Start difference. First operand 887 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:40,944 INFO L93 Difference]: Finished difference Result 1319 states and 4182 transitions. [2021-06-05 14:37:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:40,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:40,946 INFO L225 Difference]: With dead ends: 1319 [2021-06-05 14:37:40,946 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 14:37:40,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 14:37:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 897. [2021-06-05 14:37:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4073660714285716) internal successors, (3053), 896 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3053 transitions. [2021-06-05 14:37:40,956 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3053 transitions. Word has length 20 [2021-06-05 14:37:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:40,957 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3053 transitions. [2021-06-05 14:37:40,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3053 transitions. [2021-06-05 14:37:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:40,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:40,958 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:41,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-06-05 14:37:41,158 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:41,158 INFO L82 PathProgramCache]: Analyzing trace with hash -819021760, now seen corresponding path program 248 times [2021-06-05 14:37:41,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:41,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638161440] [2021-06-05 14:37:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:41,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:41,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638161440] [2021-06-05 14:37:41,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638161440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:41,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236111173] [2021-06-05 14:37:41,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:41,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:41,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:41,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:41,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:41,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236111173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:41,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:41,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:37:41,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083321184] [2021-06-05 14:37:41,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:41,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:41,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:41,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:41,443 INFO L87 Difference]: Start difference. First operand 897 states and 3053 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:42,209 INFO L93 Difference]: Finished difference Result 1230 states and 3985 transitions. [2021-06-05 14:37:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:42,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:42,210 INFO L225 Difference]: With dead ends: 1230 [2021-06-05 14:37:42,210 INFO L226 Difference]: Without dead ends: 1230 [2021-06-05 14:37:42,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 733.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:37:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-05 14:37:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 887. [2021-06-05 14:37:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.415349887133183) internal successors, (3026), 886 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3026 transitions. [2021-06-05 14:37:42,221 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3026 transitions. Word has length 20 [2021-06-05 14:37:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:42,221 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3026 transitions. [2021-06-05 14:37:42,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3026 transitions. [2021-06-05 14:37:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:42,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:42,222 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:42,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3616 [2021-06-05 14:37:42,422 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:42,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1591996514, now seen corresponding path program 249 times [2021-06-05 14:37:42,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:42,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953878278] [2021-06-05 14:37:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:42,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:42,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953878278] [2021-06-05 14:37:42,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953878278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:42,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344694805] [2021-06-05 14:37:42,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:42,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:42,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:42,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:42,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:42,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344694805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:42,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:42,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:42,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579205372] [2021-06-05 14:37:42,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:42,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:42,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:42,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:42,769 INFO L87 Difference]: Start difference. First operand 887 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:43,437 INFO L93 Difference]: Finished difference Result 1205 states and 3896 transitions. [2021-06-05 14:37:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:43,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:43,439 INFO L225 Difference]: With dead ends: 1205 [2021-06-05 14:37:43,439 INFO L226 Difference]: Without dead ends: 1205 [2021-06-05 14:37:43,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 688.0ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:37:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-05 14:37:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 886. [2021-06-05 14:37:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4135593220338984) internal successors, (3021), 885 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3021 transitions. [2021-06-05 14:37:43,449 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3021 transitions. Word has length 20 [2021-06-05 14:37:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:43,449 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3021 transitions. [2021-06-05 14:37:43,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3021 transitions. [2021-06-05 14:37:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:43,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:43,450 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:43,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3624 [2021-06-05 14:37:43,651 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:43,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1078633014, now seen corresponding path program 250 times [2021-06-05 14:37:43,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:43,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307179377] [2021-06-05 14:37:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:43,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:43,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307179377] [2021-06-05 14:37:43,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307179377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:43,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10216057] [2021-06-05 14:37:43,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:43,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:43,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:43,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10216057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:43,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:43,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:37:43,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628257058] [2021-06-05 14:37:43,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:43,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:43,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:43,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:43,978 INFO L87 Difference]: Start difference. First operand 886 states and 3021 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:44,699 INFO L93 Difference]: Finished difference Result 1169 states and 3816 transitions. [2021-06-05 14:37:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:44,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:44,700 INFO L225 Difference]: With dead ends: 1169 [2021-06-05 14:37:44,700 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 14:37:44,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 685.8ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:37:44,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 14:37:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 874. [2021-06-05 14:37:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.415807560137457) internal successors, (2982), 873 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-06-05 14:37:44,710 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-06-05 14:37:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:44,710 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-06-05 14:37:44,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-06-05 14:37:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:44,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:44,711 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:44,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:44,912 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1669793570, now seen corresponding path program 251 times [2021-06-05 14:37:44,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:44,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664914902] [2021-06-05 14:37:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:44,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:44,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664914902] [2021-06-05 14:37:44,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664914902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:44,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349866655] [2021-06-05 14:37:44,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:45,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:45,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:45,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349866655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:45,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:45,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:45,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121263799] [2021-06-05 14:37:45,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:45,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:45,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:45,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:45,188 INFO L87 Difference]: Start difference. First operand 874 states and 2982 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:45,596 INFO L93 Difference]: Finished difference Result 1140 states and 3669 transitions. [2021-06-05 14:37:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:45,598 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 14:37:45,598 INFO L226 Difference]: Without dead ends: 1140 [2021-06-05 14:37:45,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 395.5ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:37:45,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-05 14:37:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 877. [2021-06-05 14:37:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.41324200913242) internal successors, (2990), 876 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2990 transitions. [2021-06-05 14:37:45,616 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2990 transitions. Word has length 20 [2021-06-05 14:37:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:45,616 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2990 transitions. [2021-06-05 14:37:45,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2990 transitions. [2021-06-05 14:37:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:45,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:45,618 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:45,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3642,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:45,818 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1916815508, now seen corresponding path program 252 times [2021-06-05 14:37:45,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:45,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223911395] [2021-06-05 14:37:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:45,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:45,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223911395] [2021-06-05 14:37:45,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223911395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:45,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602680289] [2021-06-05 14:37:45,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:45,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:45,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:45,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:45,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:46,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602680289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:46,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:46,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:46,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950566222] [2021-06-05 14:37:46,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:46,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:46,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:46,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:46,075 INFO L87 Difference]: Start difference. First operand 877 states and 2990 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:46,801 INFO L93 Difference]: Finished difference Result 1255 states and 3956 transitions. [2021-06-05 14:37:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:37:46,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:46,803 INFO L225 Difference]: With dead ends: 1255 [2021-06-05 14:37:46,803 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 14:37:46,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 658.7ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:37:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 14:37:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 880. [2021-06-05 14:37:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4141069397042094) internal successors, (3001), 879 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-06-05 14:37:46,820 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-06-05 14:37:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:46,820 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-06-05 14:37:46,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-06-05 14:37:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:46,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:46,821 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:47,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:47,022 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:47,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:47,022 INFO L82 PathProgramCache]: Analyzing trace with hash 884244066, now seen corresponding path program 253 times [2021-06-05 14:37:47,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:47,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104999679] [2021-06-05 14:37:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:47,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:47,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104999679] [2021-06-05 14:37:47,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104999679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:47,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228338942] [2021-06-05 14:37:47,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:47,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228338942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:47,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:47,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:47,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641456208] [2021-06-05 14:37:47,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:47,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:47,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:47,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:47,302 INFO L87 Difference]: Start difference. First operand 880 states and 3001 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:47,747 INFO L93 Difference]: Finished difference Result 1189 states and 3781 transitions. [2021-06-05 14:37:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:47,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:47,748 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 14:37:47,748 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 14:37:47,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 14:37:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 874. [2021-06-05 14:37:47,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.415807560137457) internal successors, (2982), 873 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-06-05 14:37:47,758 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-06-05 14:37:47,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:47,759 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-06-05 14:37:47,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-06-05 14:37:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:47,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:47,760 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:47,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3649,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:47,960 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:47,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:47,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1223044570, now seen corresponding path program 254 times [2021-06-05 14:37:47,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:47,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160605819] [2021-06-05 14:37:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:48,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:48,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160605819] [2021-06-05 14:37:48,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160605819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:48,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44109241] [2021-06-05 14:37:48,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:48,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:48,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:48,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:48,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44109241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:48,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:48,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:48,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073931459] [2021-06-05 14:37:48,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:48,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:48,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:48,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:48,227 INFO L87 Difference]: Start difference. First operand 874 states and 2982 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:48,628 INFO L93 Difference]: Finished difference Result 1182 states and 3754 transitions. [2021-06-05 14:37:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:48,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:48,630 INFO L225 Difference]: With dead ends: 1182 [2021-06-05 14:37:48,630 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 14:37:48,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 14:37:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 893. [2021-06-05 14:37:48,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4091928251121075) internal successors, (3041), 892 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3041 transitions. [2021-06-05 14:37:48,640 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3041 transitions. Word has length 20 [2021-06-05 14:37:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:48,641 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3041 transitions. [2021-06-05 14:37:48,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3041 transitions. [2021-06-05 14:37:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:48,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:48,642 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:48,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:48,842 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:48,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1222540054, now seen corresponding path program 255 times [2021-06-05 14:37:48,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:48,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789681738] [2021-06-05 14:37:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:48,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:48,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789681738] [2021-06-05 14:37:48,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789681738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:48,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920703788] [2021-06-05 14:37:48,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:48,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:48,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:49,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920703788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:49,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:49,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:49,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213643677] [2021-06-05 14:37:49,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:49,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:49,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:49,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:49,119 INFO L87 Difference]: Start difference. First operand 893 states and 3041 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:49,685 INFO L93 Difference]: Finished difference Result 1195 states and 3797 transitions. [2021-06-05 14:37:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:37:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:49,687 INFO L225 Difference]: With dead ends: 1195 [2021-06-05 14:37:49,687 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 14:37:49,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:37:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 14:37:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 893. [2021-06-05 14:37:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.405829596412556) internal successors, (3038), 892 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3038 transitions. [2021-06-05 14:37:49,697 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3038 transitions. Word has length 20 [2021-06-05 14:37:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:49,697 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3038 transitions. [2021-06-05 14:37:49,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3038 transitions. [2021-06-05 14:37:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:49,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:49,698 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:49,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3658,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:49,899 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:49,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1631484408, now seen corresponding path program 256 times [2021-06-05 14:37:49,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:49,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286231400] [2021-06-05 14:37:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:49,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:49,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286231400] [2021-06-05 14:37:49,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286231400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:49,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838201720] [2021-06-05 14:37:49,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:50,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:50,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:50,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:50,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838201720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:50,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:50,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:50,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827935018] [2021-06-05 14:37:50,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:50,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:50,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:50,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:50,166 INFO L87 Difference]: Start difference. First operand 893 states and 3038 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:50,629 INFO L93 Difference]: Finished difference Result 1131 states and 3640 transitions. [2021-06-05 14:37:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:37:50,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:50,630 INFO L225 Difference]: With dead ends: 1131 [2021-06-05 14:37:50,630 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 14:37:50,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 14:37:50,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 890. [2021-06-05 14:37:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.408323959505062) internal successors, (3030), 889 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3030 transitions. [2021-06-05 14:37:50,640 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3030 transitions. Word has length 20 [2021-06-05 14:37:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:50,641 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3030 transitions. [2021-06-05 14:37:50,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3030 transitions. [2021-06-05 14:37:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:50,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:50,642 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:50,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3663,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:50,842 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:50,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:50,842 INFO L82 PathProgramCache]: Analyzing trace with hash -514686352, now seen corresponding path program 257 times [2021-06-05 14:37:50,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:50,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212769398] [2021-06-05 14:37:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:50,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:50,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212769398] [2021-06-05 14:37:50,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212769398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:50,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906276851] [2021-06-05 14:37:50,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:51,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:51,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:51,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:51,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:51,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906276851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:51,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:51,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920271017] [2021-06-05 14:37:51,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:51,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:51,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:51,131 INFO L87 Difference]: Start difference. First operand 890 states and 3030 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:51,470 INFO L93 Difference]: Finished difference Result 1057 states and 3471 transitions. [2021-06-05 14:37:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:51,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:51,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:51,472 INFO L225 Difference]: With dead ends: 1057 [2021-06-05 14:37:51,472 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 14:37:51,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:37:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 14:37:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 871. [2021-06-05 14:37:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.418390804597701) internal successors, (2974), 870 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2974 transitions. [2021-06-05 14:37:51,481 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2974 transitions. Word has length 20 [2021-06-05 14:37:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:51,481 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2974 transitions. [2021-06-05 14:37:51,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2974 transitions. [2021-06-05 14:37:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:51,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:51,482 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:51,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3668 [2021-06-05 14:37:51,683 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:51,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2083858536, now seen corresponding path program 258 times [2021-06-05 14:37:51,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:51,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603624363] [2021-06-05 14:37:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:51,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:51,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603624363] [2021-06-05 14:37:51,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603624363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463320308] [2021-06-05 14:37:51,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:51,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:51,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:51,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463320308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:51,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:51,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287710438] [2021-06-05 14:37:51,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:51,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:51,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:51,979 INFO L87 Difference]: Start difference. First operand 871 states and 2974 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:52,454 INFO L93 Difference]: Finished difference Result 1173 states and 3762 transitions. [2021-06-05 14:37:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:52,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:52,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:52,456 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 14:37:52,456 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 14:37:52,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:37:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 14:37:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 878. [2021-06-05 14:37:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.419612314709236) internal successors, (2999), 877 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2999 transitions. [2021-06-05 14:37:52,465 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2999 transitions. Word has length 20 [2021-06-05 14:37:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:52,465 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2999 transitions. [2021-06-05 14:37:52,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2999 transitions. [2021-06-05 14:37:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:52,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:52,467 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:52,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-05 14:37:52,667 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:52,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1375500318, now seen corresponding path program 259 times [2021-06-05 14:37:52,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:52,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531653580] [2021-06-05 14:37:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:52,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:52,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531653580] [2021-06-05 14:37:52,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531653580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:52,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620205729] [2021-06-05 14:37:52,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:52,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:52,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:52,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620205729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:52,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:52,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:52,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263520304] [2021-06-05 14:37:52,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:52,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:52,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:52,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:52,960 INFO L87 Difference]: Start difference. First operand 878 states and 2999 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:53,926 INFO L93 Difference]: Finished difference Result 1387 states and 4260 transitions. [2021-06-05 14:37:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:37:53,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:53,928 INFO L225 Difference]: With dead ends: 1387 [2021-06-05 14:37:53,928 INFO L226 Difference]: Without dead ends: 1387 [2021-06-05 14:37:53,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 891.1ms TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:37:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-06-05 14:37:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 884. [2021-06-05 14:37:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.4246885617214042) internal successors, (3024), 883 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3024 transitions. [2021-06-05 14:37:53,939 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3024 transitions. Word has length 20 [2021-06-05 14:37:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:53,939 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3024 transitions. [2021-06-05 14:37:53,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3024 transitions. [2021-06-05 14:37:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:53,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:53,940 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:54,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:54,141 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:54,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1425559256, now seen corresponding path program 260 times [2021-06-05 14:37:54,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:54,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118874898] [2021-06-05 14:37:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:54,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:54,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118874898] [2021-06-05 14:37:54,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118874898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:54,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372673880] [2021-06-05 14:37:54,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:54,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:54,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:54,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:54,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372673880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:54,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:54,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:54,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342258841] [2021-06-05 14:37:54,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:54,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:54,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:54,424 INFO L87 Difference]: Start difference. First operand 884 states and 3024 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:54,916 INFO L93 Difference]: Finished difference Result 1250 states and 3939 transitions. [2021-06-05 14:37:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:54,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:54,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:54,918 INFO L225 Difference]: With dead ends: 1250 [2021-06-05 14:37:54,918 INFO L226 Difference]: Without dead ends: 1244 [2021-06-05 14:37:54,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:37:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-05 14:37:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 884. [2021-06-05 14:37:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.417893544733862) internal successors, (3018), 883 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-06-05 14:37:54,928 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-06-05 14:37:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:54,929 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-06-05 14:37:54,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-06-05 14:37:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:54,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:54,930 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:55,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3682,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:55,130 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:55,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash 749468942, now seen corresponding path program 261 times [2021-06-05 14:37:55,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:55,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073789370] [2021-06-05 14:37:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:55,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:55,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073789370] [2021-06-05 14:37:55,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073789370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:55,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533288379] [2021-06-05 14:37:55,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:55,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:55,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:55,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533288379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:55,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:55,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:55,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634284704] [2021-06-05 14:37:55,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:55,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:55,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:55,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:55,446 INFO L87 Difference]: Start difference. First operand 884 states and 3018 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:56,186 INFO L93 Difference]: Finished difference Result 1109 states and 3593 transitions. [2021-06-05 14:37:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:56,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:56,188 INFO L225 Difference]: With dead ends: 1109 [2021-06-05 14:37:56,188 INFO L226 Difference]: Without dead ends: 1095 [2021-06-05 14:37:56,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 741.6ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:37:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-06-05 14:37:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 884. [2021-06-05 14:37:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.417893544733862) internal successors, (3018), 883 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-06-05 14:37:56,198 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-06-05 14:37:56,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:56,198 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-06-05 14:37:56,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-06-05 14:37:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:56,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:56,199 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:56,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3691 [2021-06-05 14:37:56,400 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:56,400 INFO L82 PathProgramCache]: Analyzing trace with hash 373166306, now seen corresponding path program 262 times [2021-06-05 14:37:56,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:56,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597430376] [2021-06-05 14:37:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:56,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:56,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597430376] [2021-06-05 14:37:56,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597430376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:56,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069288451] [2021-06-05 14:37:56,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:56,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:56,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:56,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:56,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:56,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069288451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:56,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:56,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:37:56,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715554353] [2021-06-05 14:37:56,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:56,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:56,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:56,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:56,761 INFO L87 Difference]: Start difference. First operand 884 states and 3018 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,195 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-06-05 14:37:57,429 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-06-05 14:37:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:57,519 INFO L93 Difference]: Finished difference Result 1050 states and 3462 transitions. [2021-06-05 14:37:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:57,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:57,520 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 14:37:57,521 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 14:37:57,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 801.7ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:37:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 14:37:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 884. [2021-06-05 14:37:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.417893544733862) internal successors, (3018), 883 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-06-05 14:37:57,532 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-06-05 14:37:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:57,532 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-06-05 14:37:57,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,532 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-06-05 14:37:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:57,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:57,533 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:57,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:57,749 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -265281438, now seen corresponding path program 263 times [2021-06-05 14:37:57,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:57,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376777034] [2021-06-05 14:37:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:57,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:57,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376777034] [2021-06-05 14:37:57,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376777034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:57,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371572417] [2021-06-05 14:37:57,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:57,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:57,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:57,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:57,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:58,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371572417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:58,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:58,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:58,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255560241] [2021-06-05 14:37:58,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:58,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:58,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:58,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:58,044 INFO L87 Difference]: Start difference. First operand 884 states and 3018 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:58,500 INFO L93 Difference]: Finished difference Result 1088 states and 3558 transitions. [2021-06-05 14:37:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:58,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:58,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:58,501 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 14:37:58,501 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 14:37:58,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 427.2ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:37:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 14:37:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 874. [2021-06-05 14:37:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4238258877434133) internal successors, (2989), 873 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2989 transitions. [2021-06-05 14:37:58,511 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2989 transitions. Word has length 20 [2021-06-05 14:37:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:58,511 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2989 transitions. [2021-06-05 14:37:58,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2989 transitions. [2021-06-05 14:37:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:58,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:58,512 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:58,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3707 [2021-06-05 14:37:58,712 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash 917484642, now seen corresponding path program 264 times [2021-06-05 14:37:58,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:58,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84788876] [2021-06-05 14:37:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:58,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:58,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84788876] [2021-06-05 14:37:58,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84788876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:58,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593577864] [2021-06-05 14:37:58,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:58,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:58,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:58,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:58,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:58,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593577864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:58,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:58,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:37:58,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185494911] [2021-06-05 14:37:58,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:58,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:58,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:58,999 INFO L87 Difference]: Start difference. First operand 874 states and 2989 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:59,528 INFO L93 Difference]: Finished difference Result 1100 states and 3587 transitions. [2021-06-05 14:37:59,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:37:59,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:59,529 INFO L225 Difference]: With dead ends: 1100 [2021-06-05 14:37:59,529 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 14:37:59,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:37:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 14:37:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 875. [2021-06-05 14:37:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.426773455377574) internal successors, (2995), 874 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2995 transitions. [2021-06-05 14:37:59,539 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2995 transitions. Word has length 20 [2021-06-05 14:37:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:59,539 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2995 transitions. [2021-06-05 14:37:59,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2995 transitions. [2021-06-05 14:37:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:59,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:59,540 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:59,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3711,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:59,741 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:59,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1039652314, now seen corresponding path program 265 times [2021-06-05 14:37:59,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:59,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571596871] [2021-06-05 14:37:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:59,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:59,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571596871] [2021-06-05 14:37:59,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571596871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:59,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933623671] [2021-06-05 14:37:59,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:59,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:37:59,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:00,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933623671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:00,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:00,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:00,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709053150] [2021-06-05 14:38:00,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:00,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:00,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:00,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:00,061 INFO L87 Difference]: Start difference. First operand 875 states and 2995 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:00,611 INFO L93 Difference]: Finished difference Result 1067 states and 3510 transitions. [2021-06-05 14:38:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:00,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:00,613 INFO L225 Difference]: With dead ends: 1067 [2021-06-05 14:38:00,613 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 14:38:00,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:00,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 14:38:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 871. [2021-06-05 14:38:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.418390804597701) internal successors, (2974), 870 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2974 transitions. [2021-06-05 14:38:00,622 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2974 transitions. Word has length 20 [2021-06-05 14:38:00,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:00,622 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2974 transitions. [2021-06-05 14:38:00,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2974 transitions. [2021-06-05 14:38:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:00,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:00,623 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:00,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3717 [2021-06-05 14:38:00,824 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:00,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1438893466, now seen corresponding path program 266 times [2021-06-05 14:38:00,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:00,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123776004] [2021-06-05 14:38:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:00,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:00,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123776004] [2021-06-05 14:38:00,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123776004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:00,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783836246] [2021-06-05 14:38:00,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:00,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:00,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:00,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:01,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783836246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:01,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:01,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:01,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392965396] [2021-06-05 14:38:01,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:01,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:01,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:01,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:01,129 INFO L87 Difference]: Start difference. First operand 871 states and 2974 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:01,953 INFO L93 Difference]: Finished difference Result 1241 states and 3910 transitions. [2021-06-05 14:38:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:01,953 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:01,954 INFO L225 Difference]: With dead ends: 1241 [2021-06-05 14:38:01,954 INFO L226 Difference]: Without dead ends: 1234 [2021-06-05 14:38:01,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 777.2ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:38:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-06-05 14:38:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 886. [2021-06-05 14:38:01,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4192090395480226) internal successors, (3026), 885 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3026 transitions. [2021-06-05 14:38:01,965 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3026 transitions. Word has length 20 [2021-06-05 14:38:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:01,965 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3026 transitions. [2021-06-05 14:38:01,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3026 transitions. [2021-06-05 14:38:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:01,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:01,966 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:02,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3723,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:02,167 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash 55518772, now seen corresponding path program 267 times [2021-06-05 14:38:02,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:02,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802344757] [2021-06-05 14:38:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:02,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:02,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802344757] [2021-06-05 14:38:02,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802344757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:02,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118633102] [2021-06-05 14:38:02,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:02,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:02,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:02,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118633102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:02,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:02,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:02,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54620467] [2021-06-05 14:38:02,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:02,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:02,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:02,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:02,465 INFO L87 Difference]: Start difference. First operand 886 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:03,314 INFO L93 Difference]: Finished difference Result 1372 states and 4241 transitions. [2021-06-05 14:38:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:38:03,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:03,316 INFO L225 Difference]: With dead ends: 1372 [2021-06-05 14:38:03,316 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 14:38:03,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 807.6ms TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:38:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 14:38:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 890. [2021-06-05 14:38:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4263217097862766) internal successors, (3046), 889 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3046 transitions. [2021-06-05 14:38:03,328 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3046 transitions. Word has length 20 [2021-06-05 14:38:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:03,328 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3046 transitions. [2021-06-05 14:38:03,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3046 transitions. [2021-06-05 14:38:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:03,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:03,329 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:03,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3731,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:03,530 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:03,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:03,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1438388950, now seen corresponding path program 268 times [2021-06-05 14:38:03,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:03,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939654311] [2021-06-05 14:38:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:03,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:03,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939654311] [2021-06-05 14:38:03,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939654311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:03,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023080510] [2021-06-05 14:38:03,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:03,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:03,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:03,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:03,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:03,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023080510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:03,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:03,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:03,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435055198] [2021-06-05 14:38:03,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:03,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:03,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:03,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:03,812 INFO L87 Difference]: Start difference. First operand 890 states and 3046 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:04,356 INFO L93 Difference]: Finished difference Result 1305 states and 4097 transitions. [2021-06-05 14:38:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:04,357 INFO L225 Difference]: With dead ends: 1305 [2021-06-05 14:38:04,357 INFO L226 Difference]: Without dead ends: 1299 [2021-06-05 14:38:04,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 515.2ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-06-05 14:38:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 896. [2021-06-05 14:38:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.4145251396648044) internal successors, (3056), 895 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3056 transitions. [2021-06-05 14:38:04,368 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3056 transitions. Word has length 20 [2021-06-05 14:38:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:04,368 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 3056 transitions. [2021-06-05 14:38:04,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3056 transitions. [2021-06-05 14:38:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:04,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:04,369 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:04,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-06-05 14:38:04,570 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:04,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1415635512, now seen corresponding path program 269 times [2021-06-05 14:38:04,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:04,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764063720] [2021-06-05 14:38:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:04,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:04,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764063720] [2021-06-05 14:38:04,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764063720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:04,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324702377] [2021-06-05 14:38:04,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:04,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:04,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:04,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:04,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:04,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324702377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:04,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:04,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:04,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607503401] [2021-06-05 14:38:04,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:04,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:04,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:04,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:04,872 INFO L87 Difference]: Start difference. First operand 896 states and 3056 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:05,568 INFO L93 Difference]: Finished difference Result 1219 states and 3879 transitions. [2021-06-05 14:38:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:05,570 INFO L225 Difference]: With dead ends: 1219 [2021-06-05 14:38:05,570 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 14:38:05,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 668.8ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 14:38:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 893. [2021-06-05 14:38:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4170403587443947) internal successors, (3048), 892 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3048 transitions. [2021-06-05 14:38:05,581 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3048 transitions. Word has length 20 [2021-06-05 14:38:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:05,581 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3048 transitions. [2021-06-05 14:38:05,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3048 transitions. [2021-06-05 14:38:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:05,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:05,582 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:05,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3747 [2021-06-05 14:38:05,782 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:05,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:05,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1670937086, now seen corresponding path program 270 times [2021-06-05 14:38:05,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:05,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644252003] [2021-06-05 14:38:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:05,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644252003] [2021-06-05 14:38:05,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644252003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966059874] [2021-06-05 14:38:05,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:05,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:38:05,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:05,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:05,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:06,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966059874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:06,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:06,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:06,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032793196] [2021-06-05 14:38:06,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:06,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:06,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:06,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:06,165 INFO L87 Difference]: Start difference. First operand 893 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:06,498 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 14:38:06,718 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 14:38:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:07,120 INFO L93 Difference]: Finished difference Result 1200 states and 3811 transitions. [2021-06-05 14:38:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:07,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:07,122 INFO L225 Difference]: With dead ends: 1200 [2021-06-05 14:38:07,122 INFO L226 Difference]: Without dead ends: 1193 [2021-06-05 14:38:07,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 963.2ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:38:07,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-06-05 14:38:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 897. [2021-06-05 14:38:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4174107142857144) internal successors, (3062), 896 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3062 transitions. [2021-06-05 14:38:07,133 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3062 transitions. Word has length 20 [2021-06-05 14:38:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:07,133 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3062 transitions. [2021-06-05 14:38:07,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3062 transitions. [2021-06-05 14:38:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:07,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:07,134 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:07,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3757,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:07,335 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:07,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:07,335 INFO L82 PathProgramCache]: Analyzing trace with hash -256127386, now seen corresponding path program 271 times [2021-06-05 14:38:07,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:07,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130784043] [2021-06-05 14:38:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:07,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130784043] [2021-06-05 14:38:07,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130784043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16476185] [2021-06-05 14:38:07,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:07,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:07,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16476185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:07,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:07,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:07,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955879836] [2021-06-05 14:38:07,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:07,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:07,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:07,653 INFO L87 Difference]: Start difference. First operand 897 states and 3062 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:08,414 INFO L93 Difference]: Finished difference Result 1122 states and 3649 transitions. [2021-06-05 14:38:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:08,414 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:08,415 INFO L225 Difference]: With dead ends: 1122 [2021-06-05 14:38:08,416 INFO L226 Difference]: Without dead ends: 1122 [2021-06-05 14:38:08,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:38:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-05 14:38:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 895. [2021-06-05 14:38:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4194630872483223) internal successors, (3057), 894 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3057 transitions. [2021-06-05 14:38:08,426 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3057 transitions. Word has length 20 [2021-06-05 14:38:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:08,426 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3057 transitions. [2021-06-05 14:38:08,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3057 transitions. [2021-06-05 14:38:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:08,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:08,427 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:08,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3769 [2021-06-05 14:38:08,627 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash 806919210, now seen corresponding path program 272 times [2021-06-05 14:38:08,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:08,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378572363] [2021-06-05 14:38:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:08,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:08,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378572363] [2021-06-05 14:38:08,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378572363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:08,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483502] [2021-06-05 14:38:08,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:08,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:08,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:08,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:08,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:08,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:08,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:08,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:08,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313212728] [2021-06-05 14:38:08,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:08,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:08,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:08,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:08,908 INFO L87 Difference]: Start difference. First operand 895 states and 3057 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:09,645 INFO L93 Difference]: Finished difference Result 1196 states and 3849 transitions. [2021-06-05 14:38:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:09,646 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:09,647 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 14:38:09,647 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 14:38:09,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 648.5ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:09,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 14:38:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 886. [2021-06-05 14:38:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4237288135593222) internal successors, (3030), 885 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3030 transitions. [2021-06-05 14:38:09,658 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3030 transitions. Word has length 20 [2021-06-05 14:38:09,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:09,658 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3030 transitions. [2021-06-05 14:38:09,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,658 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3030 transitions. [2021-06-05 14:38:09,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:09,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:09,659 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:09,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3776,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:09,860 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:09,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2099261610, now seen corresponding path program 273 times [2021-06-05 14:38:09,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:09,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692830640] [2021-06-05 14:38:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:09,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692830640] [2021-06-05 14:38:09,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692830640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019147260] [2021-06-05 14:38:09,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:10,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:10,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:10,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:10,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:10,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019147260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:10,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:10,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:10,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558970776] [2021-06-05 14:38:10,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:10,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:10,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:10,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:10,206 INFO L87 Difference]: Start difference. First operand 886 states and 3030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:10,929 INFO L93 Difference]: Finished difference Result 1165 states and 3782 transitions. [2021-06-05 14:38:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:10,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:10,931 INFO L225 Difference]: With dead ends: 1165 [2021-06-05 14:38:10,931 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 14:38:10,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 666.5ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:38:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 14:38:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 885. [2021-06-05 14:38:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.420814479638009) internal successors, (3024), 884 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3024 transitions. [2021-06-05 14:38:10,941 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3024 transitions. Word has length 20 [2021-06-05 14:38:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:10,941 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3024 transitions. [2021-06-05 14:38:10,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3024 transitions. [2021-06-05 14:38:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:10,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:10,942 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:11,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:11,143 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 827655738, now seen corresponding path program 274 times [2021-06-05 14:38:11,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:11,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018444839] [2021-06-05 14:38:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:11,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:11,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018444839] [2021-06-05 14:38:11,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018444839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:11,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008397911] [2021-06-05 14:38:11,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:11,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:11,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:11,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008397911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:11,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:11,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:11,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898916603] [2021-06-05 14:38:11,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:11,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:11,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:11,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:11,433 INFO L87 Difference]: Start difference. First operand 885 states and 3024 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:11,986 INFO L93 Difference]: Finished difference Result 1195 states and 3822 transitions. [2021-06-05 14:38:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:11,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:11,988 INFO L225 Difference]: With dead ends: 1195 [2021-06-05 14:38:11,988 INFO L226 Difference]: Without dead ends: 1189 [2021-06-05 14:38:11,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 524.9ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-05 14:38:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 895. [2021-06-05 14:38:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4149888143176734) internal successors, (3053), 894 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3053 transitions. [2021-06-05 14:38:12,005 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3053 transitions. Word has length 20 [2021-06-05 14:38:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:12,005 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3053 transitions. [2021-06-05 14:38:12,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3053 transitions. [2021-06-05 14:38:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:12,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:12,006 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:12,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3792 [2021-06-05 14:38:12,207 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:12,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1087768188, now seen corresponding path program 275 times [2021-06-05 14:38:12,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:12,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735096202] [2021-06-05 14:38:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:12,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:12,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735096202] [2021-06-05 14:38:12,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735096202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:12,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501218561] [2021-06-05 14:38:12,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:12,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:12,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:12,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501218561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:12,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:12,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:12,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145539080] [2021-06-05 14:38:12,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:12,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:12,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:12,511 INFO L87 Difference]: Start difference. First operand 895 states and 3053 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:13,194 INFO L93 Difference]: Finished difference Result 1106 states and 3625 transitions. [2021-06-05 14:38:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:13,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:13,195 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 14:38:13,195 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 14:38:13,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 657.6ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:38:13,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 14:38:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 885. [2021-06-05 14:38:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.420814479638009) internal successors, (3024), 884 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3024 transitions. [2021-06-05 14:38:13,212 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3024 transitions. Word has length 20 [2021-06-05 14:38:13,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:13,212 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3024 transitions. [2021-06-05 14:38:13,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3024 transitions. [2021-06-05 14:38:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:13,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:13,213 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:13,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:13,413 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1323250086, now seen corresponding path program 276 times [2021-06-05 14:38:13,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:13,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650651312] [2021-06-05 14:38:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:13,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:13,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650651312] [2021-06-05 14:38:13,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650651312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:13,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328037773] [2021-06-05 14:38:13,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:13,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:13,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:13,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:13,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328037773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:13,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:13,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:13,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333053094] [2021-06-05 14:38:13,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:13,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:13,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:13,724 INFO L87 Difference]: Start difference. First operand 885 states and 3024 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:14,305 INFO L93 Difference]: Finished difference Result 1107 states and 3596 transitions. [2021-06-05 14:38:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:14,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:14,307 INFO L225 Difference]: With dead ends: 1107 [2021-06-05 14:38:14,307 INFO L226 Difference]: Without dead ends: 1107 [2021-06-05 14:38:14,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 565.6ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-06-05 14:38:14,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 884. [2021-06-05 14:38:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.419026047565119) internal successors, (3019), 883 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3019 transitions. [2021-06-05 14:38:14,317 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3019 transitions. Word has length 20 [2021-06-05 14:38:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:14,317 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3019 transitions. [2021-06-05 14:38:14,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:14,317 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3019 transitions. [2021-06-05 14:38:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:14,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:14,318 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:14,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3805 [2021-06-05 14:38:14,518 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:14,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1347379442, now seen corresponding path program 277 times [2021-06-05 14:38:14,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:14,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297886244] [2021-06-05 14:38:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:14,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:14,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297886244] [2021-06-05 14:38:14,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297886244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:14,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125978279] [2021-06-05 14:38:14,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:14,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:14,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:14,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125978279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:14,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:14,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:14,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951181380] [2021-06-05 14:38:14,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:14,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:14,852 INFO L87 Difference]: Start difference. First operand 884 states and 3019 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:15,163 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-06-05 14:38:15,383 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 14:38:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:15,558 INFO L93 Difference]: Finished difference Result 1071 states and 3516 transitions. [2021-06-05 14:38:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:15,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:15,560 INFO L225 Difference]: With dead ends: 1071 [2021-06-05 14:38:15,560 INFO L226 Difference]: Without dead ends: 1071 [2021-06-05 14:38:15,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 691.1ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:15,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-05 14:38:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 872. [2021-06-05 14:38:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.421354764638347) internal successors, (2980), 871 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2980 transitions. [2021-06-05 14:38:15,569 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2980 transitions. Word has length 20 [2021-06-05 14:38:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:15,569 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2980 transitions. [2021-06-05 14:38:15,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2980 transitions. [2021-06-05 14:38:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:15,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:15,570 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:15,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-06-05 14:38:15,771 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:15,771 INFO L82 PathProgramCache]: Analyzing trace with hash 188874260, now seen corresponding path program 278 times [2021-06-05 14:38:15,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:15,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150013105] [2021-06-05 14:38:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:15,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:15,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150013105] [2021-06-05 14:38:15,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150013105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:15,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467479379] [2021-06-05 14:38:15,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:15,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:15,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:15,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:15,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:16,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467479379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:16,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:16,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:16,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520265279] [2021-06-05 14:38:16,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:16,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:16,084 INFO L87 Difference]: Start difference. First operand 872 states and 2980 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:16,531 INFO L93 Difference]: Finished difference Result 1207 states and 3830 transitions. [2021-06-05 14:38:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:16,532 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 14:38:16,532 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 14:38:16,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 14:38:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 892. [2021-06-05 14:38:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.420875420875421) internal successors, (3048), 891 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-06-05 14:38:16,543 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-06-05 14:38:16,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:16,543 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-06-05 14:38:16,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:16,543 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-06-05 14:38:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:16,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:16,544 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:16,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:16,745 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:16,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2044728718, now seen corresponding path program 279 times [2021-06-05 14:38:16,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:16,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444858760] [2021-06-05 14:38:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:16,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:16,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444858760] [2021-06-05 14:38:16,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444858760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:16,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426216180] [2021-06-05 14:38:16,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:16,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:16,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:16,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:16,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:17,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426216180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:17,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:17,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:17,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085449013] [2021-06-05 14:38:17,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:17,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:17,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:17,053 INFO L87 Difference]: Start difference. First operand 892 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:17,706 INFO L93 Difference]: Finished difference Result 1234 states and 3901 transitions. [2021-06-05 14:38:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:17,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:17,708 INFO L225 Difference]: With dead ends: 1234 [2021-06-05 14:38:17,708 INFO L226 Difference]: Without dead ends: 1234 [2021-06-05 14:38:17,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 622.0ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-06-05 14:38:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 892. [2021-06-05 14:38:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.420875420875421) internal successors, (3048), 891 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-06-05 14:38:17,718 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-06-05 14:38:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:17,718 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-06-05 14:38:17,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-06-05 14:38:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:17,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:17,719 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:17,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3839 [2021-06-05 14:38:17,920 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:17,920 INFO L82 PathProgramCache]: Analyzing trace with hash 189378776, now seen corresponding path program 280 times [2021-06-05 14:38:17,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:17,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910802483] [2021-06-05 14:38:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:17,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:17,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910802483] [2021-06-05 14:38:17,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910802483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:17,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521045393] [2021-06-05 14:38:17,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:18,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:18,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:18,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:18,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:18,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521045393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:18,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:18,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:18,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734439539] [2021-06-05 14:38:18,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:18,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:18,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:18,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:18,237 INFO L87 Difference]: Start difference. First operand 892 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:18,955 INFO L93 Difference]: Finished difference Result 1226 states and 3873 transitions. [2021-06-05 14:38:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:18,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:18,957 INFO L225 Difference]: With dead ends: 1226 [2021-06-05 14:38:18,957 INFO L226 Difference]: Without dead ends: 1220 [2021-06-05 14:38:18,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 693.5ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-06-05 14:38:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 892. [2021-06-05 14:38:18,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.4175084175084174) internal successors, (3045), 891 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3045 transitions. [2021-06-05 14:38:18,967 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3045 transitions. Word has length 20 [2021-06-05 14:38:18,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:18,967 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3045 transitions. [2021-06-05 14:38:18,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3045 transitions. [2021-06-05 14:38:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:18,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:18,968 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:19,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3847 [2021-06-05 14:38:19,169 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1251564058, now seen corresponding path program 281 times [2021-06-05 14:38:19,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:19,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46646168] [2021-06-05 14:38:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:19,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:19,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46646168] [2021-06-05 14:38:19,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46646168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:19,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095999787] [2021-06-05 14:38:19,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:19,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:19,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:19,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:19,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095999787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:19,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:19,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:19,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616770682] [2021-06-05 14:38:19,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:19,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:19,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:19,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:19,496 INFO L87 Difference]: Start difference. First operand 892 states and 3045 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:20,056 INFO L93 Difference]: Finished difference Result 1191 states and 3783 transitions. [2021-06-05 14:38:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:20,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:20,057 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 14:38:20,057 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 14:38:20,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 570.0ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 14:38:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 889. [2021-06-05 14:38:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.420045045045045) internal successors, (3037), 888 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3037 transitions. [2021-06-05 14:38:20,072 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3037 transitions. Word has length 20 [2021-06-05 14:38:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:20,073 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3037 transitions. [2021-06-05 14:38:20,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:20,073 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3037 transitions. [2021-06-05 14:38:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:20,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:20,074 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:20,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3858 [2021-06-05 14:38:20,295 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:20,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:20,295 INFO L82 PathProgramCache]: Analyzing trace with hash 727234354, now seen corresponding path program 282 times [2021-06-05 14:38:20,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:20,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080378868] [2021-06-05 14:38:20,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:20,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:20,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080378868] [2021-06-05 14:38:20,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080378868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:20,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44456720] [2021-06-05 14:38:20,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:20,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:38:20,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:20,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:20,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:20,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44456720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:20,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:20,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:20,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494558097] [2021-06-05 14:38:20,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:20,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:20,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:20,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:20,612 INFO L87 Difference]: Start difference. First operand 889 states and 3037 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:21,303 INFO L93 Difference]: Finished difference Result 1135 states and 3660 transitions. [2021-06-05 14:38:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:21,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:21,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:21,305 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 14:38:21,305 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 14:38:21,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 680.9ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 14:38:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 889. [2021-06-05 14:38:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4166666666666665) internal successors, (3034), 888 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3034 transitions. [2021-06-05 14:38:21,315 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3034 transitions. Word has length 20 [2021-06-05 14:38:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:21,315 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3034 transitions. [2021-06-05 14:38:21,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3034 transitions. [2021-06-05 14:38:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:21,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:21,316 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:21,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:21,516 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash 897232478, now seen corresponding path program 283 times [2021-06-05 14:38:21,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:21,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354840190] [2021-06-05 14:38:21,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:21,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:21,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354840190] [2021-06-05 14:38:21,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354840190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:21,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515544786] [2021-06-05 14:38:21,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:21,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:21,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515544786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:21,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:21,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:21,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520526048] [2021-06-05 14:38:21,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:21,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:21,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:21,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:21,801 INFO L87 Difference]: Start difference. First operand 889 states and 3034 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:22,220 INFO L93 Difference]: Finished difference Result 1101 states and 3597 transitions. [2021-06-05 14:38:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:22,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:22,221 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 14:38:22,221 INFO L226 Difference]: Without dead ends: 1101 [2021-06-05 14:38:22,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 419.6ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-06-05 14:38:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 886. [2021-06-05 14:38:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4192090395480226) internal successors, (3026), 885 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3026 transitions. [2021-06-05 14:38:22,231 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3026 transitions. Word has length 20 [2021-06-05 14:38:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:22,231 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3026 transitions. [2021-06-05 14:38:22,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3026 transitions. [2021-06-05 14:38:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:22,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:22,232 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:22,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3870 [2021-06-05 14:38:22,433 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:22,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2007451358, now seen corresponding path program 284 times [2021-06-05 14:38:22,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:22,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209929507] [2021-06-05 14:38:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:22,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:22,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209929507] [2021-06-05 14:38:22,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209929507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:22,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156062609] [2021-06-05 14:38:22,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:22,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:22,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:22,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:22,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:22,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156062609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:22,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:22,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:22,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148232732] [2021-06-05 14:38:22,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:22,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:22,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:22,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:22,712 INFO L87 Difference]: Start difference. First operand 886 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:23,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:23,211 INFO L93 Difference]: Finished difference Result 1288 states and 4031 transitions. [2021-06-05 14:38:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:23,211 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:23,212 INFO L225 Difference]: With dead ends: 1288 [2021-06-05 14:38:23,212 INFO L226 Difference]: Without dead ends: 1281 [2021-06-05 14:38:23,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 474.5ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-05 14:38:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 894. [2021-06-05 14:38:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.4300111982082866) internal successors, (3063), 893 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3063 transitions. [2021-06-05 14:38:23,224 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3063 transitions. Word has length 20 [2021-06-05 14:38:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:23,224 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 3063 transitions. [2021-06-05 14:38:23,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:23,224 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3063 transitions. [2021-06-05 14:38:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:23,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:23,225 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:23,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3875,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:23,425 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash -793103700, now seen corresponding path program 285 times [2021-06-05 14:38:23,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:23,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524195964] [2021-06-05 14:38:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:23,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:23,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524195964] [2021-06-05 14:38:23,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524195964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:23,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730378750] [2021-06-05 14:38:23,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:23,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:23,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:23,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:23,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:23,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730378750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:23,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:23,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:23,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501299213] [2021-06-05 14:38:23,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:23,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:23,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:23,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:23,743 INFO L87 Difference]: Start difference. First operand 894 states and 3063 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:24,504 INFO L93 Difference]: Finished difference Result 1340 states and 4181 transitions. [2021-06-05 14:38:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:24,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:24,506 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 14:38:24,506 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 14:38:24,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 718.9ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 14:38:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 898. [2021-06-05 14:38:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4370122630992195) internal successors, (3083), 897 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3083 transitions. [2021-06-05 14:38:24,517 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3083 transitions. Word has length 20 [2021-06-05 14:38:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:24,517 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3083 transitions. [2021-06-05 14:38:24,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3083 transitions. [2021-06-05 14:38:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:24,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:24,518 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:24,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3884,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:24,719 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2007955874, now seen corresponding path program 286 times [2021-06-05 14:38:24,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:24,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053083002] [2021-06-05 14:38:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:24,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:24,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053083002] [2021-06-05 14:38:24,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053083002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:24,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127307364] [2021-06-05 14:38:24,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:24,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:24,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:24,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:24,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:25,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127307364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:25,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:25,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:25,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379357269] [2021-06-05 14:38:25,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:25,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:25,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:25,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:25,014 INFO L87 Difference]: Start difference. First operand 898 states and 3083 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:25,831 INFO L93 Difference]: Finished difference Result 1332 states and 4147 transitions. [2021-06-05 14:38:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:25,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:25,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:25,833 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 14:38:25,833 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 14:38:25,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 749.4ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:38:25,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 14:38:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 904. [2021-06-05 14:38:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.425249169435216) internal successors, (3093), 903 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3093 transitions. [2021-06-05 14:38:25,844 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3093 transitions. Word has length 20 [2021-06-05 14:38:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:25,844 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 3093 transitions. [2021-06-05 14:38:25,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3093 transitions. [2021-06-05 14:38:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:25,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:25,845 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:26,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3892 [2021-06-05 14:38:26,046 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash 567013040, now seen corresponding path program 287 times [2021-06-05 14:38:26,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:26,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630672077] [2021-06-05 14:38:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:26,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:26,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630672077] [2021-06-05 14:38:26,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630672077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:26,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992853481] [2021-06-05 14:38:26,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:26,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:26,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:26,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:26,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:26,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992853481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:26,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:26,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:26,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146246473] [2021-06-05 14:38:26,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:26,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:26,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:26,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:26,397 INFO L87 Difference]: Start difference. First operand 904 states and 3093 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:26,947 INFO L93 Difference]: Finished difference Result 1236 states and 3915 transitions. [2021-06-05 14:38:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:26,947 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:26,949 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 14:38:26,949 INFO L226 Difference]: Without dead ends: 1236 [2021-06-05 14:38:26,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-06-05 14:38:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 898. [2021-06-05 14:38:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.423634336677815) internal successors, (3071), 897 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3071 transitions. [2021-06-05 14:38:26,960 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3071 transitions. Word has length 20 [2021-06-05 14:38:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:26,960 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3071 transitions. [2021-06-05 14:38:26,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3071 transitions. [2021-06-05 14:38:26,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:26,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:26,961 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:27,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3902,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:27,161 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:27,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:27,161 INFO L82 PathProgramCache]: Analyzing trace with hash 822314614, now seen corresponding path program 288 times [2021-06-05 14:38:27,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:27,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541255829] [2021-06-05 14:38:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:27,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:27,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541255829] [2021-06-05 14:38:27,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541255829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:27,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113768726] [2021-06-05 14:38:27,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:27,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:27,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:27,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:27,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:27,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113768726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:27,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:27,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:27,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296981612] [2021-06-05 14:38:27,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:27,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:27,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:27,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:27,475 INFO L87 Difference]: Start difference. First operand 898 states and 3071 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:27,984 INFO L93 Difference]: Finished difference Result 1208 states and 3845 transitions. [2021-06-05 14:38:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:27,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:27,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:27,986 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 14:38:27,986 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 14:38:27,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:27,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 14:38:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 902. [2021-06-05 14:38:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.4239733629300777) internal successors, (3085), 901 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3085 transitions. [2021-06-05 14:38:27,997 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3085 transitions. Word has length 20 [2021-06-05 14:38:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:27,997 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3085 transitions. [2021-06-05 14:38:27,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3085 transitions. [2021-06-05 14:38:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:27,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:27,998 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:28,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3910 [2021-06-05 14:38:28,198 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:28,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1104749858, now seen corresponding path program 289 times [2021-06-05 14:38:28,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:28,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55041928] [2021-06-05 14:38:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:28,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:28,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55041928] [2021-06-05 14:38:28,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55041928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:28,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978550103] [2021-06-05 14:38:28,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:28,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978550103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:28,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:28,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:28,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004436928] [2021-06-05 14:38:28,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:28,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:28,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:28,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:28,543 INFO L87 Difference]: Start difference. First operand 902 states and 3085 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:29,112 INFO L93 Difference]: Finished difference Result 1154 states and 3724 transitions. [2021-06-05 14:38:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:29,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:29,114 INFO L225 Difference]: With dead ends: 1154 [2021-06-05 14:38:29,114 INFO L226 Difference]: Without dead ends: 1154 [2021-06-05 14:38:29,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 586.5ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-06-05 14:38:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 900. [2021-06-05 14:38:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.4260289210233594) internal successors, (3080), 899 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3080 transitions. [2021-06-05 14:38:29,124 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3080 transitions. Word has length 20 [2021-06-05 14:38:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:29,124 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3080 transitions. [2021-06-05 14:38:29,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3080 transitions. [2021-06-05 14:38:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:29,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:29,125 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:29,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3919 [2021-06-05 14:38:29,326 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:29,326 INFO L82 PathProgramCache]: Analyzing trace with hash -41703262, now seen corresponding path program 290 times [2021-06-05 14:38:29,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:29,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283159013] [2021-06-05 14:38:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:29,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:29,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283159013] [2021-06-05 14:38:29,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283159013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:29,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825804439] [2021-06-05 14:38:29,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:29,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:29,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:29,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825804439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:29,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:29,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:29,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691671423] [2021-06-05 14:38:29,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:29,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:29,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:29,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:29,626 INFO L87 Difference]: Start difference. First operand 900 states and 3080 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:30,283 INFO L93 Difference]: Finished difference Result 1167 states and 3761 transitions. [2021-06-05 14:38:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:30,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:30,284 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 14:38:30,284 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 14:38:30,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 610.5ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 14:38:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 891. [2021-06-05 14:38:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4303370786516854) internal successors, (3053), 890 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3053 transitions. [2021-06-05 14:38:30,295 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3053 transitions. Word has length 20 [2021-06-05 14:38:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:30,295 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3053 transitions. [2021-06-05 14:38:30,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3053 transitions. [2021-06-05 14:38:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:30,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:30,296 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:30,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-06-05 14:38:30,496 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:30,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:30,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1250639138, now seen corresponding path program 291 times [2021-06-05 14:38:30,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:30,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316373088] [2021-06-05 14:38:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:30,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:30,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316373088] [2021-06-05 14:38:30,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316373088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:30,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058797753] [2021-06-05 14:38:30,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:30,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:30,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:30,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:30,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:30,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058797753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:30,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:30,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:30,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426710066] [2021-06-05 14:38:30,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:30,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:30,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:30,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:30,808 INFO L87 Difference]: Start difference. First operand 891 states and 3053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:31,498 INFO L93 Difference]: Finished difference Result 1153 states and 3724 transitions. [2021-06-05 14:38:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:31,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:31,500 INFO L225 Difference]: With dead ends: 1153 [2021-06-05 14:38:31,500 INFO L226 Difference]: Without dead ends: 1153 [2021-06-05 14:38:31,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 641.5ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-06-05 14:38:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 890. [2021-06-05 14:38:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4274465691788527) internal successors, (3047), 889 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3047 transitions. [2021-06-05 14:38:31,510 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3047 transitions. Word has length 20 [2021-06-05 14:38:31,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:31,510 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3047 transitions. [2021-06-05 14:38:31,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:31,511 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3047 transitions. [2021-06-05 14:38:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:31,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:31,512 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:31,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3934 [2021-06-05 14:38:31,712 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:31,712 INFO L82 PathProgramCache]: Analyzing trace with hash -20966734, now seen corresponding path program 292 times [2021-06-05 14:38:31,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:31,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292730873] [2021-06-05 14:38:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:31,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:31,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292730873] [2021-06-05 14:38:31,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292730873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:31,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275415511] [2021-06-05 14:38:31,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:31,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:31,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:31,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:31,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:32,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275415511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:32,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:32,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:32,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320503211] [2021-06-05 14:38:32,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:32,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:32,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:32,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:32,016 INFO L87 Difference]: Start difference. First operand 890 states and 3047 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:32,837 INFO L93 Difference]: Finished difference Result 1254 states and 3951 transitions. [2021-06-05 14:38:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:32,837 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:32,839 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 14:38:32,839 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 14:38:32,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 761.0ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:38:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 14:38:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 900. [2021-06-05 14:38:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.4193548387096775) internal successors, (3074), 899 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3074 transitions. [2021-06-05 14:38:32,850 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3074 transitions. Word has length 20 [2021-06-05 14:38:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:32,850 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3074 transitions. [2021-06-05 14:38:32,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3074 transitions. [2021-06-05 14:38:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:32,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:32,851 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:33,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3941,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:33,051 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:33,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:33,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1936390660, now seen corresponding path program 293 times [2021-06-05 14:38:33,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:33,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296095832] [2021-06-05 14:38:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:33,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:33,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296095832] [2021-06-05 14:38:33,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296095832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:33,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60096446] [2021-06-05 14:38:33,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:33,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:33,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60096446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:33,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:33,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:33,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573720955] [2021-06-05 14:38:33,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:33,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:33,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:33,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:33,419 INFO L87 Difference]: Start difference. First operand 900 states and 3074 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:34,271 INFO L93 Difference]: Finished difference Result 1159 states and 3739 transitions. [2021-06-05 14:38:34,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:34,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:34,272 INFO L225 Difference]: With dead ends: 1159 [2021-06-05 14:38:34,272 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 14:38:34,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 841.8ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:38:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 14:38:34,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 890. [2021-06-05 14:38:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4274465691788527) internal successors, (3047), 889 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3047 transitions. [2021-06-05 14:38:34,283 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3047 transitions. Word has length 20 [2021-06-05 14:38:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:34,283 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3047 transitions. [2021-06-05 14:38:34,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3047 transitions. [2021-06-05 14:38:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:34,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:34,284 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:34,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3954 [2021-06-05 14:38:34,484 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:34,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash 474627614, now seen corresponding path program 294 times [2021-06-05 14:38:34,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:34,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549041052] [2021-06-05 14:38:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:34,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:34,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549041052] [2021-06-05 14:38:34,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549041052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:34,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911750288] [2021-06-05 14:38:34,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:34,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:34,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:34,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:34,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911750288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:34,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:34,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:34,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505625204] [2021-06-05 14:38:34,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:34,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:34,781 INFO L87 Difference]: Start difference. First operand 890 states and 3047 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:35,252 INFO L93 Difference]: Finished difference Result 1176 states and 3789 transitions. [2021-06-05 14:38:35,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:35,252 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:35,254 INFO L225 Difference]: With dead ends: 1176 [2021-06-05 14:38:35,254 INFO L226 Difference]: Without dead ends: 1176 [2021-06-05 14:38:35,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-06-05 14:38:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 893. [2021-06-05 14:38:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4327354260089686) internal successors, (3062), 892 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3062 transitions. [2021-06-05 14:38:35,265 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3062 transitions. Word has length 20 [2021-06-05 14:38:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:35,265 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3062 transitions. [2021-06-05 14:38:35,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3062 transitions. [2021-06-05 14:38:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:35,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:35,266 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:35,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3969,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:35,466 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:35,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2098965382, now seen corresponding path program 295 times [2021-06-05 14:38:35,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:35,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19315383] [2021-06-05 14:38:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:35,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:35,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19315383] [2021-06-05 14:38:35,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19315383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:35,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597422474] [2021-06-05 14:38:35,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:35,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:35,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597422474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:35,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:35,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:35,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343847933] [2021-06-05 14:38:35,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:35,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:35,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:35,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:35,772 INFO L87 Difference]: Start difference. First operand 893 states and 3062 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:36,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:36,267 INFO L93 Difference]: Finished difference Result 1140 states and 3709 transitions. [2021-06-05 14:38:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:36,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:36,269 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 14:38:36,269 INFO L226 Difference]: Without dead ends: 1140 [2021-06-05 14:38:36,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 479.5ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-05 14:38:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 889. [2021-06-05 14:38:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4245495495495497) internal successors, (3041), 888 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3041 transitions. [2021-06-05 14:38:36,279 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3041 transitions. Word has length 20 [2021-06-05 14:38:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:36,279 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3041 transitions. [2021-06-05 14:38:36,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3041 transitions. [2021-06-05 14:38:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:36,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:36,280 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:36,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3978 [2021-06-05 14:38:36,480 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:36,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2039824350, now seen corresponding path program 296 times [2021-06-05 14:38:36,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:36,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264121266] [2021-06-05 14:38:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:36,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:36,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264121266] [2021-06-05 14:38:36,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264121266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:36,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799506667] [2021-06-05 14:38:36,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:36,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:36,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:36,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:36,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799506667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:36,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:36,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:36,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872208587] [2021-06-05 14:38:36,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:36,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:36,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:36,839 INFO L87 Difference]: Start difference. First operand 889 states and 3041 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:37,449 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-05 14:38:37,584 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-05 14:38:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:37,750 INFO L93 Difference]: Finished difference Result 1129 states and 3651 transitions. [2021-06-05 14:38:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:37,750 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:37,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:37,751 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 14:38:37,751 INFO L226 Difference]: Without dead ends: 1117 [2021-06-05 14:38:37,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 915.2ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-05 14:38:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 891. [2021-06-05 14:38:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4247191011235953) internal successors, (3048), 890 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3048 transitions. [2021-06-05 14:38:37,761 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3048 transitions. Word has length 20 [2021-06-05 14:38:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:37,761 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3048 transitions. [2021-06-05 14:38:37,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3048 transitions. [2021-06-05 14:38:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:37,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:37,762 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:37,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:37,963 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1288423912, now seen corresponding path program 297 times [2021-06-05 14:38:37,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:37,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500334102] [2021-06-05 14:38:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:38,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:38,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500334102] [2021-06-05 14:38:38,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500334102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:38,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63537844] [2021-06-05 14:38:38,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:38,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:38,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:38,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:38,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:38,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63537844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:38,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:38,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:38,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100143163] [2021-06-05 14:38:38,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:38,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:38,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:38,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:38,285 INFO L87 Difference]: Start difference. First operand 891 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:39,125 INFO L93 Difference]: Finished difference Result 1154 states and 3703 transitions. [2021-06-05 14:38:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:39,127 INFO L225 Difference]: With dead ends: 1154 [2021-06-05 14:38:39,127 INFO L226 Difference]: Without dead ends: 1148 [2021-06-05 14:38:39,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 812.0ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:38:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-06-05 14:38:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 901. [2021-06-05 14:38:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.4166666666666665) internal successors, (3075), 900 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3075 transitions. [2021-06-05 14:38:39,137 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3075 transitions. Word has length 20 [2021-06-05 14:38:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:39,137 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 3075 transitions. [2021-06-05 14:38:39,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3075 transitions. [2021-06-05 14:38:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:39,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:39,138 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:39,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,326 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:39,338 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1091119458, now seen corresponding path program 298 times [2021-06-05 14:38:39,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:39,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736571220] [2021-06-05 14:38:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:39,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:39,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736571220] [2021-06-05 14:38:39,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736571220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:39,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951219771] [2021-06-05 14:38:39,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:39,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:39,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:39,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:39,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951219771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:39,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:39,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:39,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233394614] [2021-06-05 14:38:39,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:39,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:39,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:39,689 INFO L87 Difference]: Start difference. First operand 901 states and 3075 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:40,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:40,435 INFO L93 Difference]: Finished difference Result 1047 states and 3461 transitions. [2021-06-05 14:38:40,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:40,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:40,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:40,437 INFO L225 Difference]: With dead ends: 1047 [2021-06-05 14:38:40,437 INFO L226 Difference]: Without dead ends: 1047 [2021-06-05 14:38:40,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 740.9ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:40,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-06-05 14:38:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 891. [2021-06-05 14:38:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4247191011235953) internal successors, (3048), 890 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3048 transitions. [2021-06-05 14:38:40,447 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3048 transitions. Word has length 20 [2021-06-05 14:38:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:40,447 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3048 transitions. [2021-06-05 14:38:40,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:40,447 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3048 transitions. [2021-06-05 14:38:40,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:40,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:40,448 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:40,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-06-05 14:38:40,648 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1966715728, now seen corresponding path program 299 times [2021-06-05 14:38:40,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:40,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673599824] [2021-06-05 14:38:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:40,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:40,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673599824] [2021-06-05 14:38:40,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673599824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:40,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255180127] [2021-06-05 14:38:40,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:40,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:40,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:40,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:40,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255180127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:40,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:40,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:40,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089899850] [2021-06-05 14:38:40,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:40,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:40,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:40,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:40,952 INFO L87 Difference]: Start difference. First operand 891 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:41,389 INFO L93 Difference]: Finished difference Result 1089 states and 3574 transitions. [2021-06-05 14:38:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:41,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:41,391 INFO L225 Difference]: With dead ends: 1089 [2021-06-05 14:38:41,391 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 14:38:41,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 14:38:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 890. [2021-06-05 14:38:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4263217097862766) internal successors, (3046), 889 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3046 transitions. [2021-06-05 14:38:41,402 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3046 transitions. Word has length 20 [2021-06-05 14:38:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:41,402 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3046 transitions. [2021-06-05 14:38:41,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3046 transitions. [2021-06-05 14:38:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:41,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:41,403 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:41,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:41,603 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:41,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1215315290, now seen corresponding path program 300 times [2021-06-05 14:38:41,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:41,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943119283] [2021-06-05 14:38:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:41,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:41,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943119283] [2021-06-05 14:38:41,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943119283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:41,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408225281] [2021-06-05 14:38:41,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:41,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:41,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:41,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:41,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408225281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:41,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:41,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:41,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042273884] [2021-06-05 14:38:41,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:41,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:41,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:41,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:41,912 INFO L87 Difference]: Start difference. First operand 890 states and 3046 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:42,420 INFO L93 Difference]: Finished difference Result 1109 states and 3613 transitions. [2021-06-05 14:38:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:42,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:42,421 INFO L225 Difference]: With dead ends: 1109 [2021-06-05 14:38:42,421 INFO L226 Difference]: Without dead ends: 1109 [2021-06-05 14:38:42,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-05 14:38:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 889. [2021-06-05 14:38:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4245495495495497) internal successors, (3041), 888 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3041 transitions. [2021-06-05 14:38:42,431 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3041 transitions. Word has length 20 [2021-06-05 14:38:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:42,431 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3041 transitions. [2021-06-05 14:38:42,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3041 transitions. [2021-06-05 14:38:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:42,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:42,432 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:42,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-06-05 14:38:42,633 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash 409022478, now seen corresponding path program 301 times [2021-06-05 14:38:42,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:42,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118097061] [2021-06-05 14:38:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:42,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:42,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118097061] [2021-06-05 14:38:42,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118097061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:42,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124123863] [2021-06-05 14:38:42,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:42,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:42,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:42,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124123863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:42,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:42,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:38:42,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075248521] [2021-06-05 14:38:42,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:42,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:42,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:42,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:42,924 INFO L87 Difference]: Start difference. First operand 889 states and 3041 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:43,433 INFO L93 Difference]: Finished difference Result 1067 states and 3518 transitions. [2021-06-05 14:38:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:43,434 INFO L225 Difference]: With dead ends: 1067 [2021-06-05 14:38:43,434 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 14:38:43,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 448.0ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 14:38:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 875. [2021-06-05 14:38:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4244851258581237) internal successors, (2993), 874 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2993 transitions. [2021-06-05 14:38:43,444 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2993 transitions. Word has length 20 [2021-06-05 14:38:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:43,444 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2993 transitions. [2021-06-05 14:38:43,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2993 transitions. [2021-06-05 14:38:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:43,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:43,445 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:43,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:43,645 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:43,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:43,646 INFO L82 PathProgramCache]: Analyzing trace with hash 174967158, now seen corresponding path program 302 times [2021-06-05 14:38:43,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:43,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920620212] [2021-06-05 14:38:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:43,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:43,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920620212] [2021-06-05 14:38:43,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920620212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:43,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895490847] [2021-06-05 14:38:43,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:43,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:43,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:43,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:43,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895490847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:43,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:43,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:43,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28749960] [2021-06-05 14:38:43,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:43,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:43,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:43,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:43,889 INFO L87 Difference]: Start difference. First operand 875 states and 2993 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:44,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:44,181 INFO L93 Difference]: Finished difference Result 1056 states and 3460 transitions. [2021-06-05 14:38:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:44,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:44,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:44,183 INFO L225 Difference]: With dead ends: 1056 [2021-06-05 14:38:44,183 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 14:38:44,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 14:38:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 875. [2021-06-05 14:38:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4244851258581237) internal successors, (2993), 874 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2993 transitions. [2021-06-05 14:38:44,192 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2993 transitions. Word has length 20 [2021-06-05 14:38:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:44,192 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2993 transitions. [2021-06-05 14:38:44,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2993 transitions. [2021-06-05 14:38:44,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:44,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:44,193 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:44,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-05 14:38:44,394 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:44,394 INFO L82 PathProgramCache]: Analyzing trace with hash 262399376, now seen corresponding path program 303 times [2021-06-05 14:38:44,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:44,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079133369] [2021-06-05 14:38:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:44,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:44,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079133369] [2021-06-05 14:38:44,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079133369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:44,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971067364] [2021-06-05 14:38:44,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:44,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:44,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:44,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971067364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:44,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:44,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:44,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569107353] [2021-06-05 14:38:44,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:44,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:44,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:44,649 INFO L87 Difference]: Start difference. First operand 875 states and 2993 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:45,134 INFO L93 Difference]: Finished difference Result 1164 states and 3708 transitions. [2021-06-05 14:38:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:45,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:45,136 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 14:38:45,136 INFO L226 Difference]: Without dead ends: 1157 [2021-06-05 14:38:45,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:45,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-06-05 14:38:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 888. [2021-06-05 14:38:45,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.419391206313416) internal successors, (3033), 887 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-06-05 14:38:45,146 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-06-05 14:38:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:45,146 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-06-05 14:38:45,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-06-05 14:38:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:45,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:45,147 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:45,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:45,348 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:45,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1971203602, now seen corresponding path program 304 times [2021-06-05 14:38:45,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:45,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117531138] [2021-06-05 14:38:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:45,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:45,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117531138] [2021-06-05 14:38:45,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117531138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:45,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142193457] [2021-06-05 14:38:45,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:45,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:45,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:45,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:45,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:45,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142193457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:45,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:45,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:45,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533426170] [2021-06-05 14:38:45,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:45,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:45,605 INFO L87 Difference]: Start difference. First operand 888 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:45,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:45,971 INFO L93 Difference]: Finished difference Result 1111 states and 3595 transitions. [2021-06-05 14:38:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:45,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:45,973 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 14:38:45,973 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 14:38:45,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 14:38:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 888. [2021-06-05 14:38:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.419391206313416) internal successors, (3033), 887 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-06-05 14:38:45,983 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-06-05 14:38:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:45,983 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-06-05 14:38:45,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:45,983 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-06-05 14:38:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:45,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:45,984 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:46,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-06-05 14:38:46,184 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:46,185 INFO L82 PathProgramCache]: Analyzing trace with hash 262903892, now seen corresponding path program 305 times [2021-06-05 14:38:46,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:46,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604937249] [2021-06-05 14:38:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:46,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:46,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604937249] [2021-06-05 14:38:46,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604937249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:46,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544798718] [2021-06-05 14:38:46,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:46,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:46,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:46,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:46,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544798718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:46,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:46,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:46,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915450231] [2021-06-05 14:38:46,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:46,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:46,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:46,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:46,434 INFO L87 Difference]: Start difference. First operand 888 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:46,730 INFO L93 Difference]: Finished difference Result 1075 states and 3507 transitions. [2021-06-05 14:38:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:46,731 INFO L225 Difference]: With dead ends: 1075 [2021-06-05 14:38:46,731 INFO L226 Difference]: Without dead ends: 1069 [2021-06-05 14:38:46,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 289.9ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-06-05 14:38:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 888. [2021-06-05 14:38:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.416009019165727) internal successors, (3030), 887 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3030 transitions. [2021-06-05 14:38:46,741 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3030 transitions. Word has length 20 [2021-06-05 14:38:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:46,741 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3030 transitions. [2021-06-05 14:38:46,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3030 transitions. [2021-06-05 14:38:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:46,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:46,742 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:46,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-06-05 14:38:46,943 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:46,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:46,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1178038942, now seen corresponding path program 306 times [2021-06-05 14:38:46,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:46,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647814978] [2021-06-05 14:38:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:46,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:46,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647814978] [2021-06-05 14:38:46,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647814978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:46,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223153640] [2021-06-05 14:38:46,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:47,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:47,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:47,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:47,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223153640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:47,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:47,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:47,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160120443] [2021-06-05 14:38:47,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:47,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:47,197 INFO L87 Difference]: Start difference. First operand 888 states and 3030 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:47,542 INFO L93 Difference]: Finished difference Result 1121 states and 3616 transitions. [2021-06-05 14:38:47,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:47,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:47,543 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 14:38:47,543 INFO L226 Difference]: Without dead ends: 1121 [2021-06-05 14:38:47,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-06-05 14:38:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 872. [2021-06-05 14:38:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.4270952927669347) internal successors, (2985), 871 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2985 transitions. [2021-06-05 14:38:47,553 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2985 transitions. Word has length 20 [2021-06-05 14:38:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:47,553 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2985 transitions. [2021-06-05 14:38:47,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2985 transitions. [2021-06-05 14:38:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:47,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:47,554 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:47,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:47,755 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1844384744, now seen corresponding path program 307 times [2021-06-05 14:38:47,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:47,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909290380] [2021-06-05 14:38:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:47,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:47,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909290380] [2021-06-05 14:38:47,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909290380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:47,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411046796] [2021-06-05 14:38:47,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:47,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:47,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:48,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411046796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:48,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:48,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:48,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662304460] [2021-06-05 14:38:48,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:48,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:48,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:48,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:48,005 INFO L87 Difference]: Start difference. First operand 872 states and 2985 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:48,451 INFO L93 Difference]: Finished difference Result 1217 states and 3835 transitions. [2021-06-05 14:38:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:48,452 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 14:38:48,452 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 14:38:48,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:48,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 14:38:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 888. [2021-06-05 14:38:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.422773393461105) internal successors, (3036), 887 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3036 transitions. [2021-06-05 14:38:48,463 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3036 transitions. Word has length 20 [2021-06-05 14:38:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:48,463 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3036 transitions. [2021-06-05 14:38:48,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3036 transitions. [2021-06-05 14:38:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:48,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:48,464 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:48,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4045,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:48,665 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash 216979574, now seen corresponding path program 308 times [2021-06-05 14:38:48,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:48,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389212489] [2021-06-05 14:38:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:48,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:48,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389212489] [2021-06-05 14:38:48,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389212489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:48,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905385293] [2021-06-05 14:38:48,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:48,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:48,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:48,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:48,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905385293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:48,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:48,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:48,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790556875] [2021-06-05 14:38:48,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:48,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:48,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:48,925 INFO L87 Difference]: Start difference. First operand 888 states and 3036 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:49,237 INFO L93 Difference]: Finished difference Result 1088 states and 3535 transitions. [2021-06-05 14:38:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:49,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:49,239 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 14:38:49,239 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 14:38:49,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 14:38:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 888. [2021-06-05 14:38:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.422773393461105) internal successors, (3036), 887 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3036 transitions. [2021-06-05 14:38:49,249 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3036 transitions. Word has length 20 [2021-06-05 14:38:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:49,249 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3036 transitions. [2021-06-05 14:38:49,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3036 transitions. [2021-06-05 14:38:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:49,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:49,250 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:49,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-06-05 14:38:49,450 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1843880228, now seen corresponding path program 309 times [2021-06-05 14:38:49,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:49,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350245415] [2021-06-05 14:38:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:49,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:49,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350245415] [2021-06-05 14:38:49,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350245415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:49,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033332317] [2021-06-05 14:38:49,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:49,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:49,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:49,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:49,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033332317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:49,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:49,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:49,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502477325] [2021-06-05 14:38:49,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:49,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:49,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:49,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:49,716 INFO L87 Difference]: Start difference. First operand 888 states and 3036 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:50,060 INFO L93 Difference]: Finished difference Result 1065 states and 3484 transitions. [2021-06-05 14:38:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:50,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:50,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:50,062 INFO L225 Difference]: With dead ends: 1065 [2021-06-05 14:38:50,062 INFO L226 Difference]: Without dead ends: 1059 [2021-06-05 14:38:50,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-06-05 14:38:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 888. [2021-06-05 14:38:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.419391206313416) internal successors, (3033), 887 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-06-05 14:38:50,071 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-06-05 14:38:50,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:50,072 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-06-05 14:38:50,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-06-05 14:38:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:50,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:50,073 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:50,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-06-05 14:38:50,273 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1010144234, now seen corresponding path program 310 times [2021-06-05 14:38:50,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:50,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080683792] [2021-06-05 14:38:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:50,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:50,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080683792] [2021-06-05 14:38:50,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080683792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:50,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866021045] [2021-06-05 14:38:50,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:50,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:50,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:50,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:50,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:50,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866021045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:50,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:50,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:50,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397154154] [2021-06-05 14:38:50,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:50,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:50,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:50,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:50,526 INFO L87 Difference]: Start difference. First operand 888 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:51,001 INFO L93 Difference]: Finished difference Result 1174 states and 3755 transitions. [2021-06-05 14:38:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:51,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:51,003 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 14:38:51,003 INFO L226 Difference]: Without dead ends: 1174 [2021-06-05 14:38:51,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:38:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-06-05 14:38:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 885. [2021-06-05 14:38:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.421945701357466) internal successors, (3025), 884 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3025 transitions. [2021-06-05 14:38:51,013 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3025 transitions. Word has length 20 [2021-06-05 14:38:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:51,013 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3025 transitions. [2021-06-05 14:38:51,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3025 transitions. [2021-06-05 14:38:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:51,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:51,014 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:51,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-06-05 14:38:51,215 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1136026526, now seen corresponding path program 311 times [2021-06-05 14:38:51,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:51,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750860888] [2021-06-05 14:38:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:51,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:51,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750860888] [2021-06-05 14:38:51,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750860888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:51,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904384450] [2021-06-05 14:38:51,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:51,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:51,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:51,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:51,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:51,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904384450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:51,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:51,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:51,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129576850] [2021-06-05 14:38:51,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:51,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:51,455 INFO L87 Difference]: Start difference. First operand 885 states and 3025 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:51,816 INFO L93 Difference]: Finished difference Result 1133 states and 3648 transitions. [2021-06-05 14:38:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:51,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:51,818 INFO L225 Difference]: With dead ends: 1133 [2021-06-05 14:38:51,818 INFO L226 Difference]: Without dead ends: 1133 [2021-06-05 14:38:51,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-05 14:38:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 866. [2021-06-05 14:38:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.432369942196532) internal successors, (2969), 865 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2969 transitions. [2021-06-05 14:38:51,828 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2969 transitions. Word has length 20 [2021-06-05 14:38:51,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:51,828 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2969 transitions. [2021-06-05 14:38:51,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:51,828 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2969 transitions. [2021-06-05 14:38:51,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:51,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:51,829 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:52,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-05 14:38:52,029 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:52,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1678669926, now seen corresponding path program 312 times [2021-06-05 14:38:52,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:52,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162089191] [2021-06-05 14:38:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:52,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:52,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162089191] [2021-06-05 14:38:52,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162089191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:52,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790948621] [2021-06-05 14:38:52,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:52,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:52,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:52,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:52,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790948621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:52,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:52,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:52,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290258002] [2021-06-05 14:38:52,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:52,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:52,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:52,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:52,312 INFO L87 Difference]: Start difference. First operand 866 states and 2969 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:52,711 INFO L93 Difference]: Finished difference Result 1166 states and 3748 transitions. [2021-06-05 14:38:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:52,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:52,713 INFO L225 Difference]: With dead ends: 1166 [2021-06-05 14:38:52,713 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 14:38:52,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 14:38:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 875. [2021-06-05 14:38:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4347826086956523) internal successors, (3002), 874 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 3002 transitions. [2021-06-05 14:38:52,723 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 3002 transitions. Word has length 20 [2021-06-05 14:38:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:52,723 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 3002 transitions. [2021-06-05 14:38:52,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 3002 transitions. [2021-06-05 14:38:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:52,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:52,724 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:52,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-06-05 14:38:52,925 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:52,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1122389648, now seen corresponding path program 313 times [2021-06-05 14:38:52,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:52,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720300185] [2021-06-05 14:38:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:52,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:52,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720300185] [2021-06-05 14:38:52,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720300185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:52,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101374886] [2021-06-05 14:38:52,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:53,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:53,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:53,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101374886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:53,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:53,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:53,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840567488] [2021-06-05 14:38:53,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:53,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:53,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:53,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:53,206 INFO L87 Difference]: Start difference. First operand 875 states and 3002 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:53,682 INFO L93 Difference]: Finished difference Result 1172 states and 3755 transitions. [2021-06-05 14:38:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:53,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:53,683 INFO L225 Difference]: With dead ends: 1172 [2021-06-05 14:38:53,683 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 14:38:53,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 14:38:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 872. [2021-06-05 14:38:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.4339839265212397) internal successors, (2991), 871 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2991 transitions. [2021-06-05 14:38:53,693 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2991 transitions. Word has length 20 [2021-06-05 14:38:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:53,693 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2991 transitions. [2021-06-05 14:38:53,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,693 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2991 transitions. [2021-06-05 14:38:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:53,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:53,694 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:53,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4076,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:53,895 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:53,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1660245226, now seen corresponding path program 314 times [2021-06-05 14:38:53,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:53,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113651758] [2021-06-05 14:38:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:53,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:53,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113651758] [2021-06-05 14:38:53,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113651758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:53,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107748648] [2021-06-05 14:38:53,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:54,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:54,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:54,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:54,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107748648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:54,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:54,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:38:54,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488943101] [2021-06-05 14:38:54,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:54,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:54,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:54,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:54,174 INFO L87 Difference]: Start difference. First operand 872 states and 2991 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:54,581 INFO L93 Difference]: Finished difference Result 1136 states and 3673 transitions. [2021-06-05 14:38:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:54,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:54,583 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 14:38:54,583 INFO L226 Difference]: Without dead ends: 1124 [2021-06-05 14:38:54,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-06-05 14:38:54,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 869. [2021-06-05 14:38:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.4331797235023043) internal successors, (2980), 868 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2980 transitions. [2021-06-05 14:38:54,593 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2980 transitions. Word has length 20 [2021-06-05 14:38:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:54,593 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2980 transitions. [2021-06-05 14:38:54,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,593 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2980 transitions. [2021-06-05 14:38:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:54,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:54,594 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:54,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-06-05 14:38:54,794 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:54,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2046976748, now seen corresponding path program 315 times [2021-06-05 14:38:54,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:54,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159350067] [2021-06-05 14:38:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:54,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:54,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159350067] [2021-06-05 14:38:54,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159350067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:54,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569992688] [2021-06-05 14:38:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:54,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:54,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:54,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:54,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:55,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569992688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:55,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:55,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:38:55,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795981500] [2021-06-05 14:38:55,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:38:55,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:55,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:38:55,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:38:55,039 INFO L87 Difference]: Start difference. First operand 869 states and 2980 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:55,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:55,408 INFO L93 Difference]: Finished difference Result 1127 states and 3649 transitions. [2021-06-05 14:38:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:55,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:55,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:55,409 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 14:38:55,409 INFO L226 Difference]: Without dead ends: 1109 [2021-06-05 14:38:55,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:55,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-05 14:38:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 863. [2021-06-05 14:38:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4350348027842226) internal successors, (2961), 862 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2961 transitions. [2021-06-05 14:38:55,419 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2961 transitions. Word has length 20 [2021-06-05 14:38:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:55,419 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2961 transitions. [2021-06-05 14:38:55,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2961 transitions. [2021-06-05 14:38:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:55,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:55,420 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:55,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4086,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:55,620 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:55,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1189722200, now seen corresponding path program 316 times [2021-06-05 14:38:55,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:55,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391827471] [2021-06-05 14:38:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:55,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:55,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391827471] [2021-06-05 14:38:55,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391827471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:55,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85384079] [2021-06-05 14:38:55,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:55,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:55,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:55,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:55,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:55,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85384079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:55,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:55,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:55,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242860133] [2021-06-05 14:38:55,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:55,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:55,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:55,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:55,895 INFO L87 Difference]: Start difference. First operand 863 states and 2961 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:56,325 INFO L93 Difference]: Finished difference Result 1078 states and 3489 transitions. [2021-06-05 14:38:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:56,326 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 14:38:56,326 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 14:38:56,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 14:38:56,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 863. [2021-06-05 14:38:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4315545243619487) internal successors, (2958), 862 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2958 transitions. [2021-06-05 14:38:56,336 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2958 transitions. Word has length 20 [2021-06-05 14:38:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:56,336 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2958 transitions. [2021-06-05 14:38:56,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2958 transitions. [2021-06-05 14:38:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:56,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:56,338 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:56,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4090 [2021-06-05 14:38:56,538 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:56,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1313897980, now seen corresponding path program 317 times [2021-06-05 14:38:56,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:56,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829440132] [2021-06-05 14:38:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:56,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:56,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829440132] [2021-06-05 14:38:56,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829440132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:56,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093882396] [2021-06-05 14:38:56,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:56,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:56,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:56,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093882396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:56,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:56,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:56,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352027785] [2021-06-05 14:38:56,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:56,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:56,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:56,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:56,819 INFO L87 Difference]: Start difference. First operand 863 states and 2958 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:57,202 INFO L93 Difference]: Finished difference Result 1029 states and 3380 transitions. [2021-06-05 14:38:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:38:57,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:57,204 INFO L225 Difference]: With dead ends: 1029 [2021-06-05 14:38:57,204 INFO L226 Difference]: Without dead ends: 1029 [2021-06-05 14:38:57,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 366.9ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-05 14:38:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 860. [2021-06-05 14:38:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.430733410942957) internal successors, (2947), 859 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2947 transitions. [2021-06-05 14:38:57,213 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2947 transitions. Word has length 20 [2021-06-05 14:38:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:57,213 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2947 transitions. [2021-06-05 14:38:57,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2947 transitions. [2021-06-05 14:38:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:57,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:57,214 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:57,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-06-05 14:38:57,415 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:57,415 INFO L82 PathProgramCache]: Analyzing trace with hash -832272780, now seen corresponding path program 318 times [2021-06-05 14:38:57,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:57,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082773458] [2021-06-05 14:38:57,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:57,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:57,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082773458] [2021-06-05 14:38:57,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082773458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:57,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734842405] [2021-06-05 14:38:57,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:57,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:57,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:57,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:57,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:57,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734842405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:57,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:57,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:57,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771980927] [2021-06-05 14:38:57,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:57,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:57,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:57,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:57,687 INFO L87 Difference]: Start difference. First operand 860 states and 2947 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:58,165 INFO L93 Difference]: Finished difference Result 1090 states and 3531 transitions. [2021-06-05 14:38:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:58,166 INFO L225 Difference]: With dead ends: 1090 [2021-06-05 14:38:58,166 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 14:38:58,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 14:38:58,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 857. [2021-06-05 14:38:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.433411214953271) internal successors, (2939), 856 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2939 transitions. [2021-06-05 14:38:58,180 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2939 transitions. Word has length 20 [2021-06-05 14:38:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:58,180 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2939 transitions. [2021-06-05 14:38:58,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:58,180 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2939 transitions. [2021-06-05 14:38:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:58,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:58,181 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:58,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-06-05 14:38:58,397 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash -39108120, now seen corresponding path program 319 times [2021-06-05 14:38:58,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:58,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117823059] [2021-06-05 14:38:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:58,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:58,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117823059] [2021-06-05 14:38:58,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117823059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:58,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538069795] [2021-06-05 14:38:58,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:58,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538069795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:58,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:58,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:58,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668733657] [2021-06-05 14:38:58,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:58,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:58,702 INFO L87 Difference]: Start difference. First operand 857 states and 2939 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:59,141 INFO L93 Difference]: Finished difference Result 1090 states and 3526 transitions. [2021-06-05 14:38:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:59,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:38:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:59,142 INFO L225 Difference]: With dead ends: 1090 [2021-06-05 14:38:59,142 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 14:38:59,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 14:38:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 854. [2021-06-05 14:38:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4361078546307153) internal successors, (2931), 853 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2931 transitions. [2021-06-05 14:38:59,152 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2931 transitions. Word has length 20 [2021-06-05 14:38:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:59,152 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2931 transitions. [2021-06-05 14:38:59,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2931 transitions. [2021-06-05 14:38:59,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:38:59,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:59,153 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:59,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:59,354 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:59,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:59,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2145892240, now seen corresponding path program 320 times [2021-06-05 14:38:59,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:59,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504626765] [2021-06-05 14:38:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:59,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:59,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504626765] [2021-06-05 14:38:59,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504626765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:59,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343641022] [2021-06-05 14:38:59,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:59,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:59,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:59,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:38:59,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:59,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343641022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:59,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:59,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:38:59,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481048327] [2021-06-05 14:38:59,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:59,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:59,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:59,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:59,623 INFO L87 Difference]: Start difference. First operand 854 states and 2931 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:00,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:00,355 INFO L93 Difference]: Finished difference Result 1223 states and 3849 transitions. [2021-06-05 14:39:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:39:00,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:00,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:00,356 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 14:39:00,356 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 14:39:00,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:39:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 14:39:00,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 857. [2021-06-05 14:39:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.44392523364486) internal successors, (2948), 856 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2948 transitions. [2021-06-05 14:39:00,367 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2948 transitions. Word has length 20 [2021-06-05 14:39:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:00,367 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2948 transitions. [2021-06-05 14:39:00,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2948 transitions. [2021-06-05 14:39:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:00,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:00,369 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:00,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-06-05 14:39:00,569 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash -167093828, now seen corresponding path program 321 times [2021-06-05 14:39:00,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:00,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605960020] [2021-06-05 14:39:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:00,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605960020] [2021-06-05 14:39:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605960020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324388382] [2021-06-05 14:39:00,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:00,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:00,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:00,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:00,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324388382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:00,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:00,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269845584] [2021-06-05 14:39:00,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:00,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:00,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:00,871 INFO L87 Difference]: Start difference. First operand 857 states and 2948 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:01,274 INFO L93 Difference]: Finished difference Result 1066 states and 3463 transitions. [2021-06-05 14:39:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:01,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:01,275 INFO L225 Difference]: With dead ends: 1066 [2021-06-05 14:39:01,275 INFO L226 Difference]: Without dead ends: 1054 [2021-06-05 14:39:01,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-06-05 14:39:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 857. [2021-06-05 14:39:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.4404205607476634) internal successors, (2945), 856 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2945 transitions. [2021-06-05 14:39:01,285 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2945 transitions. Word has length 20 [2021-06-05 14:39:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:01,285 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2945 transitions. [2021-06-05 14:39:01,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2945 transitions. [2021-06-05 14:39:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:01,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:01,286 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:01,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4116 [2021-06-05 14:39:01,487 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:01,487 INFO L82 PathProgramCache]: Analyzing trace with hash 2904296, now seen corresponding path program 322 times [2021-06-05 14:39:01,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:01,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249692130] [2021-06-05 14:39:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:01,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:01,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249692130] [2021-06-05 14:39:01,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249692130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:01,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480728372] [2021-06-05 14:39:01,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:01,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:01,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:01,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:01,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:01,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480728372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:01,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:01,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:01,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995954716] [2021-06-05 14:39:01,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:01,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:01,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:01,779 INFO L87 Difference]: Start difference. First operand 857 states and 2945 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:02,213 INFO L93 Difference]: Finished difference Result 1099 states and 3547 transitions. [2021-06-05 14:39:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:02,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:02,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:02,215 INFO L225 Difference]: With dead ends: 1099 [2021-06-05 14:39:02,215 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 14:39:02,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 406.8ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:02,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 14:39:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 845. [2021-06-05 14:39:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.440758293838863) internal successors, (2904), 844 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-06-05 14:39:02,224 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-06-05 14:39:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:02,225 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-06-05 14:39:02,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-06-05 14:39:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:02,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:02,226 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:02,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-05 14:39:02,426 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:02,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:02,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1566267888, now seen corresponding path program 323 times [2021-06-05 14:39:02,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:02,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943067160] [2021-06-05 14:39:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:02,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:02,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943067160] [2021-06-05 14:39:02,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943067160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:02,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712053656] [2021-06-05 14:39:02,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:02,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:02,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:02,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:02,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712053656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:02,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:02,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:02,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74536101] [2021-06-05 14:39:02,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:02,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:02,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:02,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:02,724 INFO L87 Difference]: Start difference. First operand 845 states and 2904 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:03,158 INFO L93 Difference]: Finished difference Result 1061 states and 3467 transitions. [2021-06-05 14:39:03,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:03,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:03,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:03,160 INFO L225 Difference]: With dead ends: 1061 [2021-06-05 14:39:03,160 INFO L226 Difference]: Without dead ends: 1061 [2021-06-05 14:39:03,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-06-05 14:39:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 852. [2021-06-05 14:39:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4418331374853115) internal successors, (2929), 851 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2929 transitions. [2021-06-05 14:39:03,170 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2929 transitions. Word has length 20 [2021-06-05 14:39:03,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:03,170 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2929 transitions. [2021-06-05 14:39:03,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,170 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2929 transitions. [2021-06-05 14:39:03,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:03,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:03,171 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:03,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4122,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:03,371 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:03,371 INFO L82 PathProgramCache]: Analyzing trace with hash -857909670, now seen corresponding path program 324 times [2021-06-05 14:39:03,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:03,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133047851] [2021-06-05 14:39:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:03,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:03,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133047851] [2021-06-05 14:39:03,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133047851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:03,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488698548] [2021-06-05 14:39:03,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:03,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:39:03,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:03,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:03,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:03,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488698548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:03,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:03,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:03,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931073385] [2021-06-05 14:39:03,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:03,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:03,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:03,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:03,681 INFO L87 Difference]: Start difference. First operand 852 states and 2929 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:04,311 INFO L93 Difference]: Finished difference Result 1210 states and 3806 transitions. [2021-06-05 14:39:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:04,312 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:04,313 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 14:39:04,313 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 14:39:04,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 612.7ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:39:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 14:39:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 852. [2021-06-05 14:39:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4488836662749707) internal successors, (2935), 851 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2935 transitions. [2021-06-05 14:39:04,324 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2935 transitions. Word has length 20 [2021-06-05 14:39:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:04,324 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2935 transitions. [2021-06-05 14:39:04,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2935 transitions. [2021-06-05 14:39:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:04,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:04,325 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:04,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:04,526 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:04,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1267059590, now seen corresponding path program 325 times [2021-06-05 14:39:04,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:04,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685338710] [2021-06-05 14:39:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:04,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:04,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685338710] [2021-06-05 14:39:04,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685338710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:04,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346010179] [2021-06-05 14:39:04,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:04,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:04,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:04,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346010179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:04,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:04,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:04,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949534476] [2021-06-05 14:39:04,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:04,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:04,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:04,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:04,875 INFO L87 Difference]: Start difference. First operand 852 states and 2935 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,255 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 14:39:05,446 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-06-05 14:39:05,595 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 14:39:05,848 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-06-05 14:39:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:05,916 INFO L93 Difference]: Finished difference Result 1081 states and 3503 transitions. [2021-06-05 14:39:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:05,918 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 14:39:05,918 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 14:39:05,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1004.6ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:05,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 14:39:05,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 854. [2021-06-05 14:39:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4490035169988276) internal successors, (2942), 853 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2942 transitions. [2021-06-05 14:39:05,928 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2942 transitions. Word has length 20 [2021-06-05 14:39:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:05,928 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2942 transitions. [2021-06-05 14:39:05,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2942 transitions. [2021-06-05 14:39:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:05,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:05,929 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:06,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:06,130 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:06,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:06,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1657603102, now seen corresponding path program 326 times [2021-06-05 14:39:06,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:06,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291822813] [2021-06-05 14:39:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:06,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:06,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291822813] [2021-06-05 14:39:06,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291822813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:06,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630017597] [2021-06-05 14:39:06,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:06,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:06,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:06,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:06,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:06,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630017597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:06,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:06,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:06,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274778911] [2021-06-05 14:39:06,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:06,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:06,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:06,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:06,457 INFO L87 Difference]: Start difference. First operand 854 states and 2942 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,174 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-05 14:39:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:07,388 INFO L93 Difference]: Finished difference Result 1106 states and 3555 transitions. [2021-06-05 14:39:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:07,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:07,389 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 14:39:07,389 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 14:39:07,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 868.2ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:39:07,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 14:39:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 865. [2021-06-05 14:39:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.4386574074074074) internal successors, (2971), 864 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2971 transitions. [2021-06-05 14:39:07,399 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2971 transitions. Word has length 20 [2021-06-05 14:39:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:07,399 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2971 transitions. [2021-06-05 14:39:07,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2971 transitions. [2021-06-05 14:39:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:07,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:07,400 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:07,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4144 [2021-06-05 14:39:07,601 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash 890756954, now seen corresponding path program 327 times [2021-06-05 14:39:07,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:07,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681594309] [2021-06-05 14:39:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:07,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:07,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681594309] [2021-06-05 14:39:07,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681594309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:07,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354718622] [2021-06-05 14:39:07,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:07,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:07,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:07,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:07,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354718622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:07,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:07,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:07,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530135149] [2021-06-05 14:39:07,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:07,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:07,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:07,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:07,946 INFO L87 Difference]: Start difference. First operand 865 states and 2971 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:08,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:08,701 INFO L93 Difference]: Finished difference Result 1010 states and 3342 transitions. [2021-06-05 14:39:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:08,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:08,703 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 14:39:08,703 INFO L226 Difference]: Without dead ends: 1010 [2021-06-05 14:39:08,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 738.7ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-05 14:39:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 852. [2021-06-05 14:39:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4488836662749707) internal successors, (2935), 851 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2935 transitions. [2021-06-05 14:39:08,712 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2935 transitions. Word has length 20 [2021-06-05 14:39:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:08,712 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2935 transitions. [2021-06-05 14:39:08,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2935 transitions. [2021-06-05 14:39:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:08,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:08,713 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:08,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4150,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:08,913 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:08,914 INFO L82 PathProgramCache]: Analyzing trace with hash 252309210, now seen corresponding path program 328 times [2021-06-05 14:39:08,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:08,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153881433] [2021-06-05 14:39:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:08,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:08,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153881433] [2021-06-05 14:39:08,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153881433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:08,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383244533] [2021-06-05 14:39:08,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:09,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:09,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:09,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:09,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:09,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383244533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:09,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:09,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:09,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994836644] [2021-06-05 14:39:09,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:09,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:09,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:09,221 INFO L87 Difference]: Start difference. First operand 852 states and 2935 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:09,666 INFO L93 Difference]: Finished difference Result 1054 states and 3451 transitions. [2021-06-05 14:39:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:39:09,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:09,668 INFO L225 Difference]: With dead ends: 1054 [2021-06-05 14:39:09,668 INFO L226 Difference]: Without dead ends: 1054 [2021-06-05 14:39:09,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:09,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-06-05 14:39:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 848. [2021-06-05 14:39:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.446280991735537) internal successors, (2919), 847 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2919 transitions. [2021-06-05 14:39:09,684 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2919 transitions. Word has length 20 [2021-06-05 14:39:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:09,684 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2919 transitions. [2021-06-05 14:39:09,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,684 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2919 transitions. [2021-06-05 14:39:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:09,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:09,686 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:09,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:09,886 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:09,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1435075290, now seen corresponding path program 329 times [2021-06-05 14:39:09,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:09,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459168817] [2021-06-05 14:39:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:09,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:09,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459168817] [2021-06-05 14:39:09,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459168817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:09,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659538442] [2021-06-05 14:39:09,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:10,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:10,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659538442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:10,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:10,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:10,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99872805] [2021-06-05 14:39:10,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:10,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:10,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:10,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:10,199 INFO L87 Difference]: Start difference. First operand 848 states and 2919 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:10,699 INFO L93 Difference]: Finished difference Result 1066 states and 3480 transitions. [2021-06-05 14:39:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:39:10,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:10,700 INFO L225 Difference]: With dead ends: 1066 [2021-06-05 14:39:10,700 INFO L226 Difference]: Without dead ends: 1066 [2021-06-05 14:39:10,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 477.0ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:10,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-05 14:39:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 849. [2021-06-05 14:39:10,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4492924528301887) internal successors, (2925), 848 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2925 transitions. [2021-06-05 14:39:10,710 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2925 transitions. Word has length 20 [2021-06-05 14:39:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:10,710 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2925 transitions. [2021-06-05 14:39:10,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2925 transitions. [2021-06-05 14:39:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:10,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:10,711 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:10,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4162 [2021-06-05 14:39:10,911 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash -522061666, now seen corresponding path program 330 times [2021-06-05 14:39:10,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:10,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110156118] [2021-06-05 14:39:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:10,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:10,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110156118] [2021-06-05 14:39:10,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110156118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:10,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260194892] [2021-06-05 14:39:10,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:11,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:39:11,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:11,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:11,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260194892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:11,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:11,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:11,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142400599] [2021-06-05 14:39:11,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:11,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:11,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:11,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:11,265 INFO L87 Difference]: Start difference. First operand 849 states and 2925 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:11,774 INFO L93 Difference]: Finished difference Result 1033 states and 3403 transitions. [2021-06-05 14:39:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:39:11,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:11,776 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 14:39:11,776 INFO L226 Difference]: Without dead ends: 1033 [2021-06-05 14:39:11,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-06-05 14:39:11,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 845. [2021-06-05 14:39:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.440758293838863) internal successors, (2904), 844 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-06-05 14:39:11,785 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-06-05 14:39:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:11,785 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-06-05 14:39:11,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:11,785 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-06-05 14:39:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:11,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:11,786 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:11,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4171 [2021-06-05 14:39:11,987 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:11,987 INFO L82 PathProgramCache]: Analyzing trace with hash -921302818, now seen corresponding path program 331 times [2021-06-05 14:39:11,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:11,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042804178] [2021-06-05 14:39:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:12,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:12,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042804178] [2021-06-05 14:39:12,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042804178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:12,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012082667] [2021-06-05 14:39:12,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:12,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:12,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012082667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:12,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:12,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:12,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016354562] [2021-06-05 14:39:12,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:12,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:12,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:12,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:12,301 INFO L87 Difference]: Start difference. First operand 845 states and 2904 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:13,163 INFO L93 Difference]: Finished difference Result 1224 states and 3846 transitions. [2021-06-05 14:39:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:13,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:13,165 INFO L225 Difference]: With dead ends: 1224 [2021-06-05 14:39:13,165 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 14:39:13,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 753.1ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:39:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 14:39:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 860. [2021-06-05 14:39:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.441210710128056) internal successors, (2956), 859 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2956 transitions. [2021-06-05 14:39:13,176 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2956 transitions. Word has length 20 [2021-06-05 14:39:13,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:13,176 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2956 transitions. [2021-06-05 14:39:13,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,176 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2956 transitions. [2021-06-05 14:39:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:13,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:13,177 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:13,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4177,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:13,377 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash 573109420, now seen corresponding path program 332 times [2021-06-05 14:39:13,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:13,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68285359] [2021-06-05 14:39:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:13,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:13,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68285359] [2021-06-05 14:39:13,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68285359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:13,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329913809] [2021-06-05 14:39:13,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:13,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:13,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:13,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:13,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:13,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329913809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:13,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:13,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:13,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431697861] [2021-06-05 14:39:13,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:13,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:13,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:13,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:13,675 INFO L87 Difference]: Start difference. First operand 860 states and 2956 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:14,274 INFO L93 Difference]: Finished difference Result 1219 states and 3862 transitions. [2021-06-05 14:39:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:14,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:14,276 INFO L225 Difference]: With dead ends: 1219 [2021-06-05 14:39:14,276 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 14:39:14,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 564.5ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 14:39:14,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 864. [2021-06-05 14:39:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.4484356894553883) internal successors, (2976), 863 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2976 transitions. [2021-06-05 14:39:14,287 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2976 transitions. Word has length 20 [2021-06-05 14:39:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:14,287 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2976 transitions. [2021-06-05 14:39:14,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2976 transitions. [2021-06-05 14:39:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:14,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:14,288 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:14,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4187 [2021-06-05 14:39:14,488 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:14,488 INFO L82 PathProgramCache]: Analyzing trace with hash -920798302, now seen corresponding path program 333 times [2021-06-05 14:39:14,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:14,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367462632] [2021-06-05 14:39:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:14,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:14,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367462632] [2021-06-05 14:39:14,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367462632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:14,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784245082] [2021-06-05 14:39:14,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:14,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:14,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:14,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:14,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:14,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784245082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:14,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:14,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:14,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377138628] [2021-06-05 14:39:14,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:14,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:14,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:14,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:14,801 INFO L87 Difference]: Start difference. First operand 864 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:15,317 INFO L93 Difference]: Finished difference Result 1247 states and 3929 transitions. [2021-06-05 14:39:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:15,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:15,319 INFO L225 Difference]: With dead ends: 1247 [2021-06-05 14:39:15,319 INFO L226 Difference]: Without dead ends: 1241 [2021-06-05 14:39:15,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-05 14:39:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 870. [2021-06-05 14:39:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.436133486766398) internal successors, (2986), 869 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2986 transitions. [2021-06-05 14:39:15,330 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2986 transitions. Word has length 20 [2021-06-05 14:39:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:15,330 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2986 transitions. [2021-06-05 14:39:15,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2986 transitions. [2021-06-05 14:39:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:15,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:15,331 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:15,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4194,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:15,531 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1933226160, now seen corresponding path program 334 times [2021-06-05 14:39:15,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:15,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185511074] [2021-06-05 14:39:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:15,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:15,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185511074] [2021-06-05 14:39:15,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185511074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:15,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435441003] [2021-06-05 14:39:15,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:15,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:15,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:15,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:15,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435441003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:15,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:15,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:15,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479020598] [2021-06-05 14:39:15,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:15,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:15,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:15,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:15,892 INFO L87 Difference]: Start difference. First operand 870 states and 2986 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:16,687 INFO L93 Difference]: Finished difference Result 1257 states and 3946 transitions. [2021-06-05 14:39:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:16,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:16,689 INFO L225 Difference]: With dead ends: 1257 [2021-06-05 14:39:16,689 INFO L226 Difference]: Without dead ends: 1257 [2021-06-05 14:39:16,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 750.1ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-05 14:39:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 867. [2021-06-05 14:39:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.438799076212471) internal successors, (2978), 866 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2978 transitions. [2021-06-05 14:39:16,700 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2978 transitions. Word has length 20 [2021-06-05 14:39:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:16,700 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2978 transitions. [2021-06-05 14:39:16,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2978 transitions. [2021-06-05 14:39:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:16,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:16,701 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:16,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4201,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:16,901 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:16,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:16,901 INFO L82 PathProgramCache]: Analyzing trace with hash 261463262, now seen corresponding path program 335 times [2021-06-05 14:39:16,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:16,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403978520] [2021-06-05 14:39:16,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:16,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:16,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403978520] [2021-06-05 14:39:16,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403978520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:16,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211198704] [2021-06-05 14:39:16,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:17,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:17,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:17,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:17,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:17,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211198704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:17,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:17,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:17,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848305785] [2021-06-05 14:39:17,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:17,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:17,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:17,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:17,266 INFO L87 Difference]: Start difference. First operand 867 states and 2978 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:18,129 INFO L93 Difference]: Finished difference Result 1125 states and 3627 transitions. [2021-06-05 14:39:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:18,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:18,131 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 14:39:18,131 INFO L226 Difference]: Without dead ends: 1125 [2021-06-05 14:39:18,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:39:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-06-05 14:39:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 869. [2021-06-05 14:39:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.4412442396313363) internal successors, (2987), 868 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2987 transitions. [2021-06-05 14:39:18,141 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2987 transitions. Word has length 20 [2021-06-05 14:39:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:18,141 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2987 transitions. [2021-06-05 14:39:18,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2987 transitions. [2021-06-05 14:39:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:18,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:18,142 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:18,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4217 [2021-06-05 14:39:18,343 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:18,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1324509858, now seen corresponding path program 336 times [2021-06-05 14:39:18,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:18,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14942718] [2021-06-05 14:39:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:18,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:18,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14942718] [2021-06-05 14:39:18,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14942718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:18,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364211663] [2021-06-05 14:39:18,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:18,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:39:18,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:18,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:18,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364211663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:18,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:18,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:18,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723766138] [2021-06-05 14:39:18,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:18,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:18,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:18,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:18,647 INFO L87 Difference]: Start difference. First operand 869 states and 2987 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:19,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:19,107 INFO L93 Difference]: Finished difference Result 1150 states and 3714 transitions. [2021-06-05 14:39:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:39:19,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:19,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:19,109 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 14:39:19,109 INFO L226 Difference]: Without dead ends: 1150 [2021-06-05 14:39:19,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 478.6ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-06-05 14:39:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 860. [2021-06-05 14:39:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4458672875436553) internal successors, (2960), 859 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2960 transitions. [2021-06-05 14:39:19,118 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2960 transitions. Word has length 20 [2021-06-05 14:39:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:19,119 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2960 transitions. [2021-06-05 14:39:19,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2960 transitions. [2021-06-05 14:39:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:19,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:19,120 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:19,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4227,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:19,320 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1678115038, now seen corresponding path program 337 times [2021-06-05 14:39:19,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:19,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398857194] [2021-06-05 14:39:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:19,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:19,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398857194] [2021-06-05 14:39:19,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398857194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:19,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218138476] [2021-06-05 14:39:19,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:19,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:19,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218138476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:19,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:19,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:19,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574883616] [2021-06-05 14:39:19,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:19,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:19,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:19,629 INFO L87 Difference]: Start difference. First operand 860 states and 2960 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:20,100 INFO L93 Difference]: Finished difference Result 1119 states and 3647 transitions. [2021-06-05 14:39:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:39:20,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:20,101 INFO L225 Difference]: With dead ends: 1119 [2021-06-05 14:39:20,102 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 14:39:20,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 461.7ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 14:39:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 859. [2021-06-05 14:39:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.4428904428904428) internal successors, (2954), 858 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2954 transitions. [2021-06-05 14:39:20,111 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2954 transitions. Word has length 20 [2021-06-05 14:39:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:20,111 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2954 transitions. [2021-06-05 14:39:20,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:20,111 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2954 transitions. [2021-06-05 14:39:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:20,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:20,112 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:20,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:20,313 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1345246386, now seen corresponding path program 338 times [2021-06-05 14:39:20,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:20,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103095205] [2021-06-05 14:39:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:20,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:20,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103095205] [2021-06-05 14:39:20,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103095205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:20,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255365668] [2021-06-05 14:39:20,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:20,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:20,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:20,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:20,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:20,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255365668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:20,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:20,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:20,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899020917] [2021-06-05 14:39:20,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:20,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:20,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:20,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:20,620 INFO L87 Difference]: Start difference. First operand 859 states and 2954 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:21,112 INFO L93 Difference]: Finished difference Result 1150 states and 3688 transitions. [2021-06-05 14:39:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:21,114 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 14:39:21,114 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 14:39:21,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 14:39:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 869. [2021-06-05 14:39:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.436635944700461) internal successors, (2983), 868 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2983 transitions. [2021-06-05 14:39:21,124 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2983 transitions. Word has length 20 [2021-06-05 14:39:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:21,124 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2983 transitions. [2021-06-05 14:39:21,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2983 transitions. [2021-06-05 14:39:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:21,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:21,125 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:21,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4241,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:21,325 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:21,325 INFO L82 PathProgramCache]: Analyzing trace with hash -570177540, now seen corresponding path program 339 times [2021-06-05 14:39:21,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:21,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478882456] [2021-06-05 14:39:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:21,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478882456] [2021-06-05 14:39:21,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478882456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425096465] [2021-06-05 14:39:21,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:21,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:21,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:21,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:21,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:21,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425096465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:21,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:21,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:21,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285266449] [2021-06-05 14:39:21,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:21,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:21,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:21,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:21,658 INFO L87 Difference]: Start difference. First operand 869 states and 2983 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:22,151 INFO L93 Difference]: Finished difference Result 1068 states and 3510 transitions. [2021-06-05 14:39:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:22,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:22,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:22,153 INFO L225 Difference]: With dead ends: 1068 [2021-06-05 14:39:22,153 INFO L226 Difference]: Without dead ends: 1068 [2021-06-05 14:39:22,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:22,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-06-05 14:39:22,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 859. [2021-06-05 14:39:22,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.4428904428904428) internal successors, (2954), 858 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2954 transitions. [2021-06-05 14:39:22,162 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2954 transitions. Word has length 20 [2021-06-05 14:39:22,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:22,162 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2954 transitions. [2021-06-05 14:39:22,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2954 transitions. [2021-06-05 14:39:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:22,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:22,163 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:22,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4247,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:22,364 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1840840734, now seen corresponding path program 340 times [2021-06-05 14:39:22,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:22,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210407935] [2021-06-05 14:39:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:22,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:22,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210407935] [2021-06-05 14:39:22,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210407935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:22,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702206913] [2021-06-05 14:39:22,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:22,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:22,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:22,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:22,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702206913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:22,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:22,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:22,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058961565] [2021-06-05 14:39:22,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:22,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:22,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:22,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:22,677 INFO L87 Difference]: Start difference. First operand 859 states and 2954 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:23,292 INFO L93 Difference]: Finished difference Result 1087 states and 3531 transitions. [2021-06-05 14:39:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:23,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:23,294 INFO L225 Difference]: With dead ends: 1087 [2021-06-05 14:39:23,294 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 14:39:23,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 14:39:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 851. [2021-06-05 14:39:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.451764705882353) internal successors, (2934), 850 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2934 transitions. [2021-06-05 14:39:23,304 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2934 transitions. Word has length 20 [2021-06-05 14:39:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:23,304 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2934 transitions. [2021-06-05 14:39:23,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2934 transitions. [2021-06-05 14:39:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:23,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:23,305 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:23,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4255 [2021-06-05 14:39:23,505 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:23,506 INFO L82 PathProgramCache]: Analyzing trace with hash -829788794, now seen corresponding path program 341 times [2021-06-05 14:39:23,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:23,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214954223] [2021-06-05 14:39:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:23,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:23,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214954223] [2021-06-05 14:39:23,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214954223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:23,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522014748] [2021-06-05 14:39:23,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:23,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:23,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:23,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:23,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:23,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522014748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:23,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:23,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:23,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877617133] [2021-06-05 14:39:23,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:23,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:23,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:23,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:23,869 INFO L87 Difference]: Start difference. First operand 851 states and 2934 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:24,515 INFO L93 Difference]: Finished difference Result 1051 states and 3444 transitions. [2021-06-05 14:39:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:24,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:24,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:24,516 INFO L225 Difference]: With dead ends: 1051 [2021-06-05 14:39:24,516 INFO L226 Difference]: Without dead ends: 1051 [2021-06-05 14:39:24,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 662.1ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-05 14:39:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 844. [2021-06-05 14:39:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.4377224199288254) internal successors, (2898), 843 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2898 transitions. [2021-06-05 14:39:24,525 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2898 transitions. Word has length 20 [2021-06-05 14:39:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:24,525 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2898 transitions. [2021-06-05 14:39:24,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2898 transitions. [2021-06-05 14:39:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:24,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:24,526 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:24,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4262 [2021-06-05 14:39:24,727 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:24,727 INFO L82 PathProgramCache]: Analyzing trace with hash 706464908, now seen corresponding path program 342 times [2021-06-05 14:39:24,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:24,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309254403] [2021-06-05 14:39:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:24,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:24,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309254403] [2021-06-05 14:39:24,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309254403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:24,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749748157] [2021-06-05 14:39:24,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:24,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:24,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:24,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:25,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749748157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:25,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:25,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:25,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6843436] [2021-06-05 14:39:25,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:25,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:25,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:25,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:25,012 INFO L87 Difference]: Start difference. First operand 844 states and 2898 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:25,512 INFO L93 Difference]: Finished difference Result 1200 states and 3788 transitions. [2021-06-05 14:39:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:25,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:25,513 INFO L225 Difference]: With dead ends: 1200 [2021-06-05 14:39:25,514 INFO L226 Difference]: Without dead ends: 1193 [2021-06-05 14:39:25,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 480.1ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-06-05 14:39:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 864. [2021-06-05 14:39:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.436848203939745) internal successors, (2966), 863 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2966 transitions. [2021-06-05 14:39:25,524 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2966 transitions. Word has length 20 [2021-06-05 14:39:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:25,524 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2966 transitions. [2021-06-05 14:39:25,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2966 transitions. [2021-06-05 14:39:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:25,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:25,525 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:25,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4278,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:25,725 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1527138070, now seen corresponding path program 343 times [2021-06-05 14:39:25,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:25,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493733087] [2021-06-05 14:39:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:25,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:25,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493733087] [2021-06-05 14:39:25,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493733087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:25,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645294207] [2021-06-05 14:39:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:26,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645294207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:26,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:26,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:26,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187072305] [2021-06-05 14:39:26,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:26,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:26,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:26,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:26,069 INFO L87 Difference]: Start difference. First operand 864 states and 2966 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:26,629 INFO L93 Difference]: Finished difference Result 1123 states and 3606 transitions. [2021-06-05 14:39:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:26,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:26,630 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 14:39:26,630 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 14:39:26,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 601.1ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 14:39:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 864. [2021-06-05 14:39:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.436848203939745) internal successors, (2966), 863 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2966 transitions. [2021-06-05 14:39:26,640 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2966 transitions. Word has length 20 [2021-06-05 14:39:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:26,640 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2966 transitions. [2021-06-05 14:39:26,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2966 transitions. [2021-06-05 14:39:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:26,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:26,641 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:26,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4285 [2021-06-05 14:39:26,842 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:26,842 INFO L82 PathProgramCache]: Analyzing trace with hash 706969424, now seen corresponding path program 344 times [2021-06-05 14:39:26,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:26,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512371939] [2021-06-05 14:39:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:26,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:26,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512371939] [2021-06-05 14:39:26,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512371939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:26,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898174464] [2021-06-05 14:39:26,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:26,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:26,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:26,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:27,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898174464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:27,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:27,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:27,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186700545] [2021-06-05 14:39:27,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:27,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:27,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:27,149 INFO L87 Difference]: Start difference. First operand 864 states and 2966 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:27,797 INFO L93 Difference]: Finished difference Result 1171 states and 3712 transitions. [2021-06-05 14:39:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:27,798 INFO L225 Difference]: With dead ends: 1171 [2021-06-05 14:39:27,798 INFO L226 Difference]: Without dead ends: 1165 [2021-06-05 14:39:27,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 664.8ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-06-05 14:39:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 864. [2021-06-05 14:39:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.433371958285052) internal successors, (2963), 863 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2963 transitions. [2021-06-05 14:39:27,809 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2963 transitions. Word has length 20 [2021-06-05 14:39:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:27,809 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2963 transitions. [2021-06-05 14:39:27,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2963 transitions. [2021-06-05 14:39:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:27,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:27,810 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:28,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-06-05 14:39:28,010 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash -733973410, now seen corresponding path program 345 times [2021-06-05 14:39:28,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:28,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124060392] [2021-06-05 14:39:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:28,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:28,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124060392] [2021-06-05 14:39:28,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124060392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:28,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824053153] [2021-06-05 14:39:28,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:28,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:28,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:28,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:28,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:28,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824053153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:28,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:28,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:28,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755131236] [2021-06-05 14:39:28,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:28,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:28,297 INFO L87 Difference]: Start difference. First operand 864 states and 2963 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:29,196 INFO L93 Difference]: Finished difference Result 1294 states and 4005 transitions. [2021-06-05 14:39:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:39:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:29,198 INFO L225 Difference]: With dead ends: 1294 [2021-06-05 14:39:29,198 INFO L226 Difference]: Without dead ends: 1294 [2021-06-05 14:39:29,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 834.9ms TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:39:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-06-05 14:39:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 861. [2021-06-05 14:39:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.436046511627907) internal successors, (2955), 860 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2955 transitions. [2021-06-05 14:39:29,211 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2955 transitions. Word has length 20 [2021-06-05 14:39:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:29,211 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2955 transitions. [2021-06-05 14:39:29,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2955 transitions. [2021-06-05 14:39:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:29,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:29,212 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:29,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4301,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:29,413 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:29,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1244825002, now seen corresponding path program 346 times [2021-06-05 14:39:29,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:29,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931482218] [2021-06-05 14:39:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:29,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:29,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931482218] [2021-06-05 14:39:29,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931482218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:29,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083904364] [2021-06-05 14:39:29,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:29,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:29,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083904364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:29,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:29,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:29,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12156156] [2021-06-05 14:39:29,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:29,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:29,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:29,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:29,727 INFO L87 Difference]: Start difference. First operand 861 states and 2955 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:30,320 INFO L93 Difference]: Finished difference Result 1093 states and 3531 transitions. [2021-06-05 14:39:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:30,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:30,322 INFO L225 Difference]: With dead ends: 1093 [2021-06-05 14:39:30,322 INFO L226 Difference]: Without dead ends: 1081 [2021-06-05 14:39:30,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 615.2ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-05 14:39:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 861. [2021-06-05 14:39:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.432558139534884) internal successors, (2952), 860 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2952 transitions. [2021-06-05 14:39:30,331 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2952 transitions. Word has length 20 [2021-06-05 14:39:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:30,331 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2952 transitions. [2021-06-05 14:39:30,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2952 transitions. [2021-06-05 14:39:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:30,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:30,332 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:30,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4309,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:30,533 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1414823126, now seen corresponding path program 347 times [2021-06-05 14:39:30,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:30,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446911076] [2021-06-05 14:39:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:30,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:30,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446911076] [2021-06-05 14:39:30,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446911076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:30,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473289958] [2021-06-05 14:39:30,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:30,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:30,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:30,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:30,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:30,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473289958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:30,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:30,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:30,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593118944] [2021-06-05 14:39:30,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:30,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:30,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:30,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:30,846 INFO L87 Difference]: Start difference. First operand 861 states and 2952 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:31,331 INFO L93 Difference]: Finished difference Result 1147 states and 3681 transitions. [2021-06-05 14:39:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:31,331 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:31,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:31,332 INFO L225 Difference]: With dead ends: 1147 [2021-06-05 14:39:31,332 INFO L226 Difference]: Without dead ends: 1147 [2021-06-05 14:39:31,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-05 14:39:31,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 858. [2021-06-05 14:39:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.4352392065344226) internal successors, (2944), 857 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2944 transitions. [2021-06-05 14:39:31,342 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2944 transitions. Word has length 20 [2021-06-05 14:39:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:31,342 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2944 transitions. [2021-06-05 14:39:31,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2944 transitions. [2021-06-05 14:39:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:31,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:31,343 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:31,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4318 [2021-06-05 14:39:31,544 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:31,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1769925290, now seen corresponding path program 348 times [2021-06-05 14:39:31,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:31,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103608445] [2021-06-05 14:39:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:31,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:31,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103608445] [2021-06-05 14:39:31,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103608445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:31,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073983535] [2021-06-05 14:39:31,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:31,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:31,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:31,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073983535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:31,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:31,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:31,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762706657] [2021-06-05 14:39:31,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:31,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:31,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:31,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:31,859 INFO L87 Difference]: Start difference. First operand 858 states and 2944 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:32,387 INFO L93 Difference]: Finished difference Result 1288 states and 4009 transitions. [2021-06-05 14:39:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:32,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:32,388 INFO L225 Difference]: With dead ends: 1288 [2021-06-05 14:39:32,388 INFO L226 Difference]: Without dead ends: 1281 [2021-06-05 14:39:32,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 518.3ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-05 14:39:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 866. [2021-06-05 14:39:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.446242774566474) internal successors, (2981), 865 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2981 transitions. [2021-06-05 14:39:32,399 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2981 transitions. Word has length 20 [2021-06-05 14:39:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:32,399 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2981 transitions. [2021-06-05 14:39:32,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2981 transitions. [2021-06-05 14:39:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:32,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:32,401 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:32,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4323,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:32,601 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:32,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:32,601 INFO L82 PathProgramCache]: Analyzing trace with hash -275513052, now seen corresponding path program 349 times [2021-06-05 14:39:32,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:32,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627446495] [2021-06-05 14:39:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:32,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627446495] [2021-06-05 14:39:32,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627446495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325216260] [2021-06-05 14:39:32,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:32,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:32,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:32,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325216260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:32,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:32,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:32,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319323041] [2021-06-05 14:39:32,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:32,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:32,954 INFO L87 Difference]: Start difference. First operand 866 states and 2981 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:33,657 INFO L93 Difference]: Finished difference Result 1236 states and 3906 transitions. [2021-06-05 14:39:33,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:33,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:33,659 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 14:39:33,659 INFO L226 Difference]: Without dead ends: 1236 [2021-06-05 14:39:33,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-06-05 14:39:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 870. [2021-06-05 14:39:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4533947065592634) internal successors, (3001), 869 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3001 transitions. [2021-06-05 14:39:33,670 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3001 transitions. Word has length 20 [2021-06-05 14:39:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:33,670 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 3001 transitions. [2021-06-05 14:39:33,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3001 transitions. [2021-06-05 14:39:33,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:33,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:33,671 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:33,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-06-05 14:39:33,872 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:33,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1769420774, now seen corresponding path program 350 times [2021-06-05 14:39:33,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:33,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415647421] [2021-06-05 14:39:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:33,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:33,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415647421] [2021-06-05 14:39:33,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415647421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:33,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100022609] [2021-06-05 14:39:33,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:34,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:34,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:34,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:34,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:34,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100022609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:34,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:34,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:34,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71660528] [2021-06-05 14:39:34,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:34,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:34,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:34,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:34,191 INFO L87 Difference]: Start difference. First operand 870 states and 3001 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:34,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:34,965 INFO L93 Difference]: Finished difference Result 1284 states and 4006 transitions. [2021-06-05 14:39:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:34,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:34,967 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 14:39:34,967 INFO L226 Difference]: Without dead ends: 1278 [2021-06-05 14:39:34,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 751.1ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:39:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-05 14:39:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 876. [2021-06-05 14:39:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.4411428571428573) internal successors, (3011), 875 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 3011 transitions. [2021-06-05 14:39:34,978 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 3011 transitions. Word has length 20 [2021-06-05 14:39:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:34,978 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 3011 transitions. [2021-06-05 14:39:34,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 3011 transitions. [2021-06-05 14:39:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:34,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:34,979 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:35,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4345,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:35,179 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:35,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1084603688, now seen corresponding path program 351 times [2021-06-05 14:39:35,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:35,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924435728] [2021-06-05 14:39:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:35,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:35,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924435728] [2021-06-05 14:39:35,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924435728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:35,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755440254] [2021-06-05 14:39:35,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:35,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:35,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:35,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:35,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:35,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755440254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:35,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:35,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:35,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108852803] [2021-06-05 14:39:35,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:35,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:35,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:35,468 INFO L87 Difference]: Start difference. First operand 876 states and 3011 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:36,234 INFO L93 Difference]: Finished difference Result 1326 states and 4093 transitions. [2021-06-05 14:39:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:39:36,234 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:36,235 INFO L225 Difference]: With dead ends: 1326 [2021-06-05 14:39:36,235 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 14:39:36,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 727.6ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:39:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 14:39:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 870. [2021-06-05 14:39:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4395857307249713) internal successors, (2989), 869 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2989 transitions. [2021-06-05 14:39:36,247 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2989 transitions. Word has length 20 [2021-06-05 14:39:36,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:36,247 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2989 transitions. [2021-06-05 14:39:36,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2989 transitions. [2021-06-05 14:39:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:36,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:36,248 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:36,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-06-05 14:39:36,448 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1339905262, now seen corresponding path program 352 times [2021-06-05 14:39:36,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:36,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806593471] [2021-06-05 14:39:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:36,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:36,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806593471] [2021-06-05 14:39:36,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806593471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:36,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826349757] [2021-06-05 14:39:36,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:36,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:36,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:36,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:36,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:36,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826349757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:36,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:36,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:36,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242241587] [2021-06-05 14:39:36,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:36,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:36,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:36,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:36,737 INFO L87 Difference]: Start difference. First operand 870 states and 2989 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:37,278 INFO L93 Difference]: Finished difference Result 1196 states and 3793 transitions. [2021-06-05 14:39:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:37,280 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 14:39:37,280 INFO L226 Difference]: Without dead ends: 1189 [2021-06-05 14:39:37,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 504.5ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-05 14:39:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 874. [2021-06-05 14:39:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4421534936998857) internal successors, (3005), 873 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 3005 transitions. [2021-06-05 14:39:37,290 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 3005 transitions. Word has length 20 [2021-06-05 14:39:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:37,290 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 3005 transitions. [2021-06-05 14:39:37,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 3005 transitions. [2021-06-05 14:39:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:37,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:37,292 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:37,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4361 [2021-06-05 14:39:37,492 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash -587159210, now seen corresponding path program 353 times [2021-06-05 14:39:37,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:37,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182343114] [2021-06-05 14:39:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:37,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:37,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182343114] [2021-06-05 14:39:37,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182343114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:37,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177434760] [2021-06-05 14:39:37,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:37,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:37,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:37,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:37,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:37,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177434760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:37,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:37,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:37,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814899261] [2021-06-05 14:39:37,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:37,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:37,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:37,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:37,807 INFO L87 Difference]: Start difference. First operand 874 states and 3005 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:38,539 INFO L93 Difference]: Finished difference Result 1142 states and 3672 transitions. [2021-06-05 14:39:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:38,541 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 14:39:38,541 INFO L226 Difference]: Without dead ends: 1142 [2021-06-05 14:39:38,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 709.1ms TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:39:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-05 14:39:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 872. [2021-06-05 14:39:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.442020665901263) internal successors, (2998), 871 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2998 transitions. [2021-06-05 14:39:38,551 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2998 transitions. Word has length 20 [2021-06-05 14:39:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:38,551 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2998 transitions. [2021-06-05 14:39:38,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2998 transitions. [2021-06-05 14:39:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:38,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:38,552 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:38,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4369,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:38,752 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash 475887386, now seen corresponding path program 354 times [2021-06-05 14:39:38,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:38,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080688727] [2021-06-05 14:39:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:38,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:38,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080688727] [2021-06-05 14:39:38,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080688727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:38,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899800395] [2021-06-05 14:39:38,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:38,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:38,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:38,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:38,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:39,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899800395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:39,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:39,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:39,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545020493] [2021-06-05 14:39:39,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:39,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:39,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:39,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:39,071 INFO L87 Difference]: Start difference. First operand 872 states and 2998 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:39,639 INFO L93 Difference]: Finished difference Result 1141 states and 3674 transitions. [2021-06-05 14:39:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:39,641 INFO L225 Difference]: With dead ends: 1141 [2021-06-05 14:39:39,641 INFO L226 Difference]: Without dead ends: 1141 [2021-06-05 14:39:39,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-06-05 14:39:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 863. [2021-06-05 14:39:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4466357308584685) internal successors, (2971), 862 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2971 transitions. [2021-06-05 14:39:39,651 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2971 transitions. Word has length 20 [2021-06-05 14:39:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:39,651 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2971 transitions. [2021-06-05 14:39:39,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2971 transitions. [2021-06-05 14:39:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:39,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:39,652 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:39,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4376 [2021-06-05 14:39:39,852 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:39,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1768229786, now seen corresponding path program 355 times [2021-06-05 14:39:39,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:39,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943318110] [2021-06-05 14:39:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:39,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:39,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943318110] [2021-06-05 14:39:39,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943318110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:39,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876025922] [2021-06-05 14:39:39,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:40,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:40,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876025922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:40,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:40,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:40,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765406145] [2021-06-05 14:39:40,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:40,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:40,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:40,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:40,200 INFO L87 Difference]: Start difference. First operand 863 states and 2971 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:40,790 INFO L93 Difference]: Finished difference Result 1127 states and 3637 transitions. [2021-06-05 14:39:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:40,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:40,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:40,792 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 14:39:40,792 INFO L226 Difference]: Without dead ends: 1127 [2021-06-05 14:39:40,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 583.6ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-05 14:39:40,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 862. [2021-06-05 14:39:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-05 14:39:40,802 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-05 14:39:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:40,802 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-05 14:39:40,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,802 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-05 14:39:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:40,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:40,803 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:41,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4388,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:41,003 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash 496623914, now seen corresponding path program 356 times [2021-06-05 14:39:41,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:41,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341719779] [2021-06-05 14:39:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:41,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:41,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341719779] [2021-06-05 14:39:41,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341719779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:41,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420810353] [2021-06-05 14:39:41,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:41,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:41,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:41,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:41,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420810353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:41,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:41,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:41,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773718589] [2021-06-05 14:39:41,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:41,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:41,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:41,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:41,311 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:42,123 INFO L93 Difference]: Finished difference Result 1223 states and 3852 transitions. [2021-06-05 14:39:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:42,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:42,125 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 14:39:42,125 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 14:39:42,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 757.5ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:39:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 14:39:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 872. [2021-06-05 14:39:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.4374282433983927) internal successors, (2994), 871 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2994 transitions. [2021-06-05 14:39:42,136 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2994 transitions. Word has length 20 [2021-06-05 14:39:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:42,136 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2994 transitions. [2021-06-05 14:39:42,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2994 transitions. [2021-06-05 14:39:42,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:42,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:42,137 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:42,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4401,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:42,339 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:42,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1418800012, now seen corresponding path program 357 times [2021-06-05 14:39:42,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:42,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924866290] [2021-06-05 14:39:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:42,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924866290] [2021-06-05 14:39:42,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924866290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296158386] [2021-06-05 14:39:42,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:42,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:42,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:42,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:42,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:42,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296158386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:42,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:42,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:42,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694813011] [2021-06-05 14:39:42,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:42,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:42,664 INFO L87 Difference]: Start difference. First operand 872 states and 2994 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:43,427 INFO L93 Difference]: Finished difference Result 1145 states and 3682 transitions. [2021-06-05 14:39:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:43,429 INFO L225 Difference]: With dead ends: 1145 [2021-06-05 14:39:43,429 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 14:39:43,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 741.1ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:39:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 14:39:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 862. [2021-06-05 14:39:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-05 14:39:43,439 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-05 14:39:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:43,439 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-05 14:39:43,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-05 14:39:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:43,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:43,440 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:43,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4412,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:43,641 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:43,641 INFO L82 PathProgramCache]: Analyzing trace with hash 992218262, now seen corresponding path program 358 times [2021-06-05 14:39:43,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:43,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109080128] [2021-06-05 14:39:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:43,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:43,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109080128] [2021-06-05 14:39:43,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109080128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:43,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003806120] [2021-06-05 14:39:43,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:43,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:43,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:43,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:43,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:43,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003806120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:43,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:43,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:43,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418996749] [2021-06-05 14:39:43,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:43,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:43,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:43,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:43,936 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:44,614 INFO L93 Difference]: Finished difference Result 1172 states and 3759 transitions. [2021-06-05 14:39:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:44,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:44,615 INFO L225 Difference]: With dead ends: 1172 [2021-06-05 14:39:44,615 INFO L226 Difference]: Without dead ends: 1172 [2021-06-05 14:39:44,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 643.7ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-06-05 14:39:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 865. [2021-06-05 14:39:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.449074074074074) internal successors, (2980), 864 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2980 transitions. [2021-06-05 14:39:44,626 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2980 transitions. Word has length 20 [2021-06-05 14:39:44,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:44,626 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2980 transitions. [2021-06-05 14:39:44,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:44,626 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2980 transitions. [2021-06-05 14:39:44,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:44,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:44,627 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:44,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-06-05 14:39:44,828 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:44,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:44,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1678411266, now seen corresponding path program 359 times [2021-06-05 14:39:44,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:44,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260795603] [2021-06-05 14:39:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:44,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:44,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260795603] [2021-06-05 14:39:44,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260795603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:44,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282247864] [2021-06-05 14:39:44,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:44,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:44,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:45,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282247864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:45,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:45,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:45,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872862556] [2021-06-05 14:39:45,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:45,145 INFO L87 Difference]: Start difference. First operand 865 states and 2980 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:45,871 INFO L93 Difference]: Finished difference Result 1136 states and 3679 transitions. [2021-06-05 14:39:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:45,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:45,873 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 14:39:45,873 INFO L226 Difference]: Without dead ends: 1136 [2021-06-05 14:39:45,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 676.0ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:39:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-06-05 14:39:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 862. [2021-06-05 14:39:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-05 14:39:45,882 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-05 14:39:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:45,883 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-05 14:39:45,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-05 14:39:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:45,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:45,884 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:46,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4429 [2021-06-05 14:39:46,084 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1522233702, now seen corresponding path program 360 times [2021-06-05 14:39:46,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:46,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724587662] [2021-06-05 14:39:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:46,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:46,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724587662] [2021-06-05 14:39:46,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724587662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:46,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990093300] [2021-06-05 14:39:46,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:46,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:39:46,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:46,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:46,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:46,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990093300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:46,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:46,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:46,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68235221] [2021-06-05 14:39:46,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:46,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:46,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:46,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:46,440 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:46,994 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-05 14:39:47,126 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-05 14:39:47,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:47,289 INFO L93 Difference]: Finished difference Result 1088 states and 3528 transitions. [2021-06-05 14:39:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:47,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:47,291 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 14:39:47,291 INFO L226 Difference]: Without dead ends: 1076 [2021-06-05 14:39:47,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 872.3ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-06-05 14:39:47,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 864. [2021-06-05 14:39:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.443800695249131) internal successors, (2972), 863 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2972 transitions. [2021-06-05 14:39:47,300 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2972 transitions. Word has length 20 [2021-06-05 14:39:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:47,300 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2972 transitions. [2021-06-05 14:39:47,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2972 transitions. [2021-06-05 14:39:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:47,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:47,301 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:47,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4436,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:47,502 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:47,502 INFO L82 PathProgramCache]: Analyzing trace with hash -770833264, now seen corresponding path program 361 times [2021-06-05 14:39:47,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:47,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096294390] [2021-06-05 14:39:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:47,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:47,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096294390] [2021-06-05 14:39:47,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096294390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:47,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626848375] [2021-06-05 14:39:47,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:47,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:47,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:47,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626848375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:47,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:47,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:47,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104079233] [2021-06-05 14:39:47,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:47,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:47,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:47,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:47,819 INFO L87 Difference]: Start difference. First operand 864 states and 2972 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:48,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:48,598 INFO L93 Difference]: Finished difference Result 1117 states and 3590 transitions. [2021-06-05 14:39:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:48,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:48,599 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 14:39:48,599 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 14:39:48,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 735.3ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:48,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 14:39:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 874. [2021-06-05 14:39:48,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4375715922107677) internal successors, (3001), 873 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 3001 transitions. [2021-06-05 14:39:48,609 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 3001 transitions. Word has length 20 [2021-06-05 14:39:48,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:48,609 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 3001 transitions. [2021-06-05 14:39:48,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:48,609 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 3001 transitions. [2021-06-05 14:39:48,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:48,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:48,610 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:48,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4444 [2021-06-05 14:39:48,811 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:48,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:48,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1608710106, now seen corresponding path program 362 times [2021-06-05 14:39:48,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:48,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384760635] [2021-06-05 14:39:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:48,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:48,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384760635] [2021-06-05 14:39:48,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384760635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:48,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369798156] [2021-06-05 14:39:48,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:48,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:48,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:49,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369798156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:49,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:49,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:49,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382106885] [2021-06-05 14:39:49,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:49,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:49,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:49,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:49,140 INFO L87 Difference]: Start difference. First operand 874 states and 3001 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:49,806 INFO L93 Difference]: Finished difference Result 1029 states and 3397 transitions. [2021-06-05 14:39:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:49,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:49,808 INFO L225 Difference]: With dead ends: 1029 [2021-06-05 14:39:49,808 INFO L226 Difference]: Without dead ends: 1029 [2021-06-05 14:39:49,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 666.7ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-05 14:39:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 862. [2021-06-05 14:39:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-06-05 14:39:49,818 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-06-05 14:39:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:49,818 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-06-05 14:39:49,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-06-05 14:39:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:49,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:49,819 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:50,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4452 [2021-06-05 14:39:50,019 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:50,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1449125080, now seen corresponding path program 363 times [2021-06-05 14:39:50,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:50,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268835042] [2021-06-05 14:39:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:50,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:50,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268835042] [2021-06-05 14:39:50,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268835042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:50,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24094806] [2021-06-05 14:39:50,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:50,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:50,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:50,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:50,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:50,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24094806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:50,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:50,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:50,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114851421] [2021-06-05 14:39:50,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:50,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:50,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:50,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:50,347 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:50,795 INFO L93 Difference]: Finished difference Result 1071 states and 3508 transitions. [2021-06-05 14:39:50,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:50,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:50,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:50,797 INFO L225 Difference]: With dead ends: 1071 [2021-06-05 14:39:50,797 INFO L226 Difference]: Without dead ends: 1071 [2021-06-05 14:39:50,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:50,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-05 14:39:50,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 861. [2021-06-05 14:39:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.4453488372093024) internal successors, (2963), 860 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2963 transitions. [2021-06-05 14:39:50,806 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2963 transitions. Word has length 20 [2021-06-05 14:39:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:50,806 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2963 transitions. [2021-06-05 14:39:50,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2963 transitions. [2021-06-05 14:39:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:50,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:50,807 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:51,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4460 [2021-06-05 14:39:51,008 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:51,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:51,008 INFO L82 PathProgramCache]: Analyzing trace with hash -697724642, now seen corresponding path program 364 times [2021-06-05 14:39:51,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:51,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346998080] [2021-06-05 14:39:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:51,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:51,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346998080] [2021-06-05 14:39:51,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346998080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:51,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033081174] [2021-06-05 14:39:51,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:51,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:51,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:51,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:51,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033081174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:51,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:51,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:51,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322414349] [2021-06-05 14:39:51,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:51,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:51,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:51,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:51,317 INFO L87 Difference]: Start difference. First operand 861 states and 2963 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:51,831 INFO L93 Difference]: Finished difference Result 1091 states and 3547 transitions. [2021-06-05 14:39:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:51,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:51,832 INFO L225 Difference]: With dead ends: 1091 [2021-06-05 14:39:51,833 INFO L226 Difference]: Without dead ends: 1091 [2021-06-05 14:39:51,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 483.9ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-06-05 14:39:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 860. [2021-06-05 14:39:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4435389988358556) internal successors, (2958), 859 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2958 transitions. [2021-06-05 14:39:51,842 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2958 transitions. Word has length 20 [2021-06-05 14:39:51,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:51,842 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2958 transitions. [2021-06-05 14:39:51,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2958 transitions. [2021-06-05 14:39:51,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:51,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:51,843 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:52,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4465,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:52,044 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:52,044 INFO L82 PathProgramCache]: Analyzing trace with hash 926613126, now seen corresponding path program 365 times [2021-06-05 14:39:52,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:52,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434529141] [2021-06-05 14:39:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:52,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:52,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434529141] [2021-06-05 14:39:52,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434529141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:52,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479158853] [2021-06-05 14:39:52,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:52,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:52,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:52,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:52,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:52,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479158853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:52,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:52,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:39:52,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345980531] [2021-06-05 14:39:52,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:52,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:52,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:52,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:52,343 INFO L87 Difference]: Start difference. First operand 860 states and 2958 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:52,887 INFO L93 Difference]: Finished difference Result 1049 states and 3452 transitions. [2021-06-05 14:39:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:52,889 INFO L225 Difference]: With dead ends: 1049 [2021-06-05 14:39:52,889 INFO L226 Difference]: Without dead ends: 1049 [2021-06-05 14:39:52,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 495.8ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-06-05 14:39:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 845. [2021-06-05 14:39:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.440758293838863) internal successors, (2904), 844 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-06-05 14:39:52,898 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-06-05 14:39:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:52,898 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-06-05 14:39:52,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-06-05 14:39:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:52,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:52,899 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:53,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4472 [2021-06-05 14:39:53,100 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:53,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:53,100 INFO L82 PathProgramCache]: Analyzing trace with hash 501257584, now seen corresponding path program 366 times [2021-06-05 14:39:53,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:53,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292641329] [2021-06-05 14:39:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:53,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:53,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292641329] [2021-06-05 14:39:53,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292641329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:53,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531176241] [2021-06-05 14:39:53,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:53,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:53,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:53,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:53,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:53,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531176241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:53,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:53,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:39:53,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576070967] [2021-06-05 14:39:53,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:39:53,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:53,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:39:53,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:39:53,368 INFO L87 Difference]: Start difference. First operand 845 states and 2904 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:54,350 INFO L93 Difference]: Finished difference Result 1468 states and 4547 transitions. [2021-06-05 14:39:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:39:54,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:54,352 INFO L225 Difference]: With dead ends: 1468 [2021-06-05 14:39:54,352 INFO L226 Difference]: Without dead ends: 1468 [2021-06-05 14:39:54,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 895.0ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:39:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-06-05 14:39:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 852. [2021-06-05 14:39:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4512338425381905) internal successors, (2937), 851 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2937 transitions. [2021-06-05 14:39:54,364 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2937 transitions. Word has length 20 [2021-06-05 14:39:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:54,364 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2937 transitions. [2021-06-05 14:39:54,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2937 transitions. [2021-06-05 14:39:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:54,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:54,365 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:54,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4479,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:54,565 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1814911300, now seen corresponding path program 367 times [2021-06-05 14:39:54,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:54,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402919786] [2021-06-05 14:39:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:54,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:54,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402919786] [2021-06-05 14:39:54,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402919786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:54,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630208418] [2021-06-05 14:39:54,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:54,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:54,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630208418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:54,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:54,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:54,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098124442] [2021-06-05 14:39:54,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:54,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:54,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:54,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:54,918 INFO L87 Difference]: Start difference. First operand 852 states and 2937 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:55,425 INFO L93 Difference]: Finished difference Result 1191 states and 3856 transitions. [2021-06-05 14:39:55,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:39:55,425 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:55,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:55,427 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 14:39:55,427 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 14:39:55,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 576.9ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 14:39:55,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 852. [2021-06-05 14:39:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4477085781433607) internal successors, (2934), 851 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2934 transitions. [2021-06-05 14:39:55,437 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2934 transitions. Word has length 20 [2021-06-05 14:39:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:55,437 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2934 transitions. [2021-06-05 14:39:55,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2934 transitions. [2021-06-05 14:39:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:55,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:55,438 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:55,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4486 [2021-06-05 14:39:55,638 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:55,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:55,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1644913176, now seen corresponding path program 368 times [2021-06-05 14:39:55,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:55,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568180850] [2021-06-05 14:39:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:55,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:55,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568180850] [2021-06-05 14:39:55,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568180850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:55,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778234198] [2021-06-05 14:39:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:55,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:55,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:55,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:55,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:55,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778234198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:55,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:55,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:39:55,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003647693] [2021-06-05 14:39:55,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:39:55,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:55,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:39:55,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:39:55,915 INFO L87 Difference]: Start difference. First operand 852 states and 2934 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:56,462 INFO L93 Difference]: Finished difference Result 1362 states and 4296 transitions. [2021-06-05 14:39:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:56,462 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:56,464 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 14:39:56,464 INFO L226 Difference]: Without dead ends: 1362 [2021-06-05 14:39:56,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-05 14:39:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 849. [2021-06-05 14:39:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4504716981132075) internal successors, (2926), 848 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2926 transitions. [2021-06-05 14:39:56,475 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2926 transitions. Word has length 20 [2021-06-05 14:39:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:56,475 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2926 transitions. [2021-06-05 14:39:56,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2926 transitions. [2021-06-05 14:39:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:56,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:56,476 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:56,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4493 [2021-06-05 14:39:56,676 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:56,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1227165978, now seen corresponding path program 369 times [2021-06-05 14:39:56,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:56,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162379725] [2021-06-05 14:39:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:56,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:56,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162379725] [2021-06-05 14:39:56,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162379725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:56,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209654375] [2021-06-05 14:39:56,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:56,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:56,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:56,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:56,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209654375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:56,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:56,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:39:56,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582511312] [2021-06-05 14:39:56,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:39:56,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:39:56,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:39:56,972 INFO L87 Difference]: Start difference. First operand 849 states and 2926 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:57,465 INFO L93 Difference]: Finished difference Result 1223 states and 3916 transitions. [2021-06-05 14:39:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:39:57,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:57,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:57,467 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 14:39:57,467 INFO L226 Difference]: Without dead ends: 1205 [2021-06-05 14:39:57,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-05 14:39:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 849. [2021-06-05 14:39:57,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.446933962264151) internal successors, (2923), 848 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2923 transitions. [2021-06-05 14:39:57,477 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2923 transitions. Word has length 20 [2021-06-05 14:39:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:57,477 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2923 transitions. [2021-06-05 14:39:57,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2923 transitions. [2021-06-05 14:39:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:57,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:57,478 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:57,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4497 [2021-06-05 14:39:57,679 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:57,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1637361588, now seen corresponding path program 370 times [2021-06-05 14:39:57,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:57,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73821007] [2021-06-05 14:39:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:57,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:57,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73821007] [2021-06-05 14:39:57,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73821007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:57,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735245124] [2021-06-05 14:39:57,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:57,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:57,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:57,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:57,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:57,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735245124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:57,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:57,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:39:57,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479373816] [2021-06-05 14:39:57,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:39:57,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:57,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:39:57,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:39:57,926 INFO L87 Difference]: Start difference. First operand 849 states and 2923 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:58,331 INFO L93 Difference]: Finished difference Result 1355 states and 4290 transitions. [2021-06-05 14:39:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:39:58,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:58,333 INFO L225 Difference]: With dead ends: 1355 [2021-06-05 14:39:58,333 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 14:39:58,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 367.3ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 14:39:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 846. [2021-06-05 14:39:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 3.4497041420118344) internal successors, (2915), 845 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2915 transitions. [2021-06-05 14:39:58,344 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2915 transitions. Word has length 20 [2021-06-05 14:39:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:58,344 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 2915 transitions. [2021-06-05 14:39:58,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2915 transitions. [2021-06-05 14:39:58,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:58,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:58,345 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:58,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4504 [2021-06-05 14:39:58,545 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:58,546 INFO L82 PathProgramCache]: Analyzing trace with hash -99774376, now seen corresponding path program 371 times [2021-06-05 14:39:58,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:58,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233432608] [2021-06-05 14:39:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:58,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:58,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233432608] [2021-06-05 14:39:58,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233432608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:58,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283568348] [2021-06-05 14:39:58,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:58,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:58,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:58,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:58,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:58,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283568348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:58,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:58,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:58,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321642215] [2021-06-05 14:39:58,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:58,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:58,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:58,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:58,835 INFO L87 Difference]: Start difference. First operand 846 states and 2915 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:59,373 INFO L93 Difference]: Finished difference Result 1325 states and 4178 transitions. [2021-06-05 14:39:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:59,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:39:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:59,375 INFO L225 Difference]: With dead ends: 1325 [2021-06-05 14:39:59,375 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 14:39:59,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 14:39:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 860. [2021-06-05 14:39:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4435389988358556) internal successors, (2958), 859 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2958 transitions. [2021-06-05 14:39:59,386 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2958 transitions. Word has length 20 [2021-06-05 14:39:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:59,386 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2958 transitions. [2021-06-05 14:39:59,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2958 transitions. [2021-06-05 14:39:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:39:59,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:59,387 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:59,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4509 [2021-06-05 14:39:59,588 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:59,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1961589942, now seen corresponding path program 372 times [2021-06-05 14:39:59,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:59,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849986205] [2021-06-05 14:39:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:59,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:59,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849986205] [2021-06-05 14:39:59,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849986205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:59,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075700716] [2021-06-05 14:39:59,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:59,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:59,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:59,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:39:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:59,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075700716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:59,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:59,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:39:59,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16006742] [2021-06-05 14:39:59,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:59,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:59,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:59,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:59,981 INFO L87 Difference]: Start difference. First operand 860 states and 2958 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:00,706 INFO L93 Difference]: Finished difference Result 1210 states and 3880 transitions. [2021-06-05 14:40:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:00,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:00,707 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 14:40:00,707 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 14:40:00,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 796.8ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 14:40:00,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 857. [2021-06-05 14:40:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.439252336448598) internal successors, (2944), 856 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2944 transitions. [2021-06-05 14:40:00,717 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2944 transitions. Word has length 20 [2021-06-05 14:40:00,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:00,717 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2944 transitions. [2021-06-05 14:40:00,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2944 transitions. [2021-06-05 14:40:00,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:00,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:00,718 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:00,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4516,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:00,919 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:00,919 INFO L82 PathProgramCache]: Analyzing trace with hash -99269860, now seen corresponding path program 373 times [2021-06-05 14:40:00,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:00,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457834952] [2021-06-05 14:40:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:00,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:00,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457834952] [2021-06-05 14:40:00,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457834952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:00,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900404579] [2021-06-05 14:40:00,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:01,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900404579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:01,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:01,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:01,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558621533] [2021-06-05 14:40:01,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:01,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:01,276 INFO L87 Difference]: Start difference. First operand 857 states and 2944 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:02,145 INFO L93 Difference]: Finished difference Result 1264 states and 4001 transitions. [2021-06-05 14:40:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:02,147 INFO L225 Difference]: With dead ends: 1264 [2021-06-05 14:40:02,147 INFO L226 Difference]: Without dead ends: 1258 [2021-06-05 14:40:02,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 892.4ms TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-06-05 14:40:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 857. [2021-06-05 14:40:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.435747663551402) internal successors, (2941), 856 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2941 transitions. [2021-06-05 14:40:02,158 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2941 transitions. Word has length 20 [2021-06-05 14:40:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:02,158 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2941 transitions. [2021-06-05 14:40:02,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2941 transitions. [2021-06-05 14:40:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:02,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:02,159 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:02,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4527 [2021-06-05 14:40:02,360 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:02,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:02,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1540212694, now seen corresponding path program 374 times [2021-06-05 14:40:02,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:02,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126789525] [2021-06-05 14:40:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:02,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126789525] [2021-06-05 14:40:02,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126789525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115541609] [2021-06-05 14:40:02,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:02,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:02,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:02,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:02,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115541609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:02,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:02,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:02,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392672153] [2021-06-05 14:40:02,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:02,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:02,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:02,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:02,669 INFO L87 Difference]: Start difference. First operand 857 states and 2941 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:03,699 INFO L93 Difference]: Finished difference Result 1402 states and 4346 transitions. [2021-06-05 14:40:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:40:03,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:03,701 INFO L225 Difference]: With dead ends: 1402 [2021-06-05 14:40:03,701 INFO L226 Difference]: Without dead ends: 1402 [2021-06-05 14:40:03,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 955.4ms TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:40:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-06-05 14:40:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 854. [2021-06-05 14:40:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4384525205158263) internal successors, (2933), 853 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2933 transitions. [2021-06-05 14:40:03,718 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2933 transitions. Word has length 20 [2021-06-05 14:40:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:03,719 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2933 transitions. [2021-06-05 14:40:03,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2933 transitions. [2021-06-05 14:40:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:03,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:03,720 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:03,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4537,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:03,934 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:03,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:03,935 INFO L82 PathProgramCache]: Analyzing trace with hash 438585718, now seen corresponding path program 375 times [2021-06-05 14:40:03,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:03,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491801404] [2021-06-05 14:40:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:04,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:04,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491801404] [2021-06-05 14:40:04,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491801404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:04,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383206888] [2021-06-05 14:40:04,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:04,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:04,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:04,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:04,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:04,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383206888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:04,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:04,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:04,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015855515] [2021-06-05 14:40:04,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:04,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:04,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:04,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:04,302 INFO L87 Difference]: Start difference. First operand 854 states and 2933 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:04,968 INFO L93 Difference]: Finished difference Result 1186 states and 3820 transitions. [2021-06-05 14:40:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:04,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:04,970 INFO L225 Difference]: With dead ends: 1186 [2021-06-05 14:40:04,970 INFO L226 Difference]: Without dead ends: 1174 [2021-06-05 14:40:04,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 710.7ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-06-05 14:40:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 854. [2021-06-05 14:40:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4349355216881596) internal successors, (2930), 853 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2930 transitions. [2021-06-05 14:40:04,980 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2930 transitions. Word has length 20 [2021-06-05 14:40:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:04,980 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2930 transitions. [2021-06-05 14:40:04,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2930 transitions. [2021-06-05 14:40:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:04,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:04,981 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:05,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4543,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:05,182 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:05,182 INFO L82 PathProgramCache]: Analyzing trace with hash 608583842, now seen corresponding path program 376 times [2021-06-05 14:40:05,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:05,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436222715] [2021-06-05 14:40:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:05,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:05,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436222715] [2021-06-05 14:40:05,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436222715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:05,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302697962] [2021-06-05 14:40:05,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:05,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:05,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:05,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:05,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:05,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302697962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:05,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:05,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:05,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418308468] [2021-06-05 14:40:05,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:05,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:05,483 INFO L87 Difference]: Start difference. First operand 854 states and 2930 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:06,162 INFO L93 Difference]: Finished difference Result 1269 states and 4057 transitions. [2021-06-05 14:40:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:06,162 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:06,163 INFO L225 Difference]: With dead ends: 1269 [2021-06-05 14:40:06,163 INFO L226 Difference]: Without dead ends: 1269 [2021-06-05 14:40:06,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 568.4ms TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:40:06,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-06-05 14:40:06,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 851. [2021-06-05 14:40:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.4376470588235293) internal successors, (2922), 850 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2922 transitions. [2021-06-05 14:40:06,174 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2922 transitions. Word has length 20 [2021-06-05 14:40:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:06,174 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2922 transitions. [2021-06-05 14:40:06,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:06,174 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2922 transitions. [2021-06-05 14:40:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:06,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:06,175 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:06,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4550 [2021-06-05 14:40:06,375 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:06,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1718802722, now seen corresponding path program 377 times [2021-06-05 14:40:06,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:06,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743751981] [2021-06-05 14:40:06,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:06,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:06,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743751981] [2021-06-05 14:40:06,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743751981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:06,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793990576] [2021-06-05 14:40:06,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:06,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:06,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:06,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:06,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:06,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793990576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:06,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:06,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:06,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734692704] [2021-06-05 14:40:06,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:06,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:06,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:06,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:06,684 INFO L87 Difference]: Start difference. First operand 851 states and 2922 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:07,305 INFO L93 Difference]: Finished difference Result 1407 states and 4378 transitions. [2021-06-05 14:40:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:07,305 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:07,307 INFO L225 Difference]: With dead ends: 1407 [2021-06-05 14:40:07,307 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 14:40:07,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 14:40:07,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 859. [2021-06-05 14:40:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.448717948717949) internal successors, (2959), 858 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2959 transitions. [2021-06-05 14:40:07,318 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2959 transitions. Word has length 20 [2021-06-05 14:40:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:07,319 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2959 transitions. [2021-06-05 14:40:07,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2959 transitions. [2021-06-05 14:40:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:07,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:07,320 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:07,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4555,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:07,520 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:07,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:07,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1081752336, now seen corresponding path program 378 times [2021-06-05 14:40:07,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:07,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072237391] [2021-06-05 14:40:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:07,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:07,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072237391] [2021-06-05 14:40:07,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072237391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:07,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966673645] [2021-06-05 14:40:07,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:07,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:07,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:07,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:07,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:07,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966673645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:07,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:07,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:07,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435128088] [2021-06-05 14:40:07,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:07,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:07,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:07,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:07,873 INFO L87 Difference]: Start difference. First operand 859 states and 2959 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:08,763 INFO L93 Difference]: Finished difference Result 1304 states and 4124 transitions. [2021-06-05 14:40:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:08,765 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 14:40:08,765 INFO L226 Difference]: Without dead ends: 1304 [2021-06-05 14:40:08,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 883.5ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:40:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-05 14:40:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 863. [2021-06-05 14:40:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4559164733178656) internal successors, (2979), 862 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2979 transitions. [2021-06-05 14:40:08,776 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2979 transitions. Word has length 20 [2021-06-05 14:40:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:08,776 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2979 transitions. [2021-06-05 14:40:08,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2979 transitions. [2021-06-05 14:40:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:08,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:08,777 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:08,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4562 [2021-06-05 14:40:08,978 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:08,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1719307238, now seen corresponding path program 379 times [2021-06-05 14:40:08,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:08,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148337919] [2021-06-05 14:40:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:09,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148337919] [2021-06-05 14:40:09,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148337919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135737939] [2021-06-05 14:40:09,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:09,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:09,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135737939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:09,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:09,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:09,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480299374] [2021-06-05 14:40:09,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:09,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:09,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:09,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:09,321 INFO L87 Difference]: Start difference. First operand 863 states and 2979 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:10,423 INFO L93 Difference]: Finished difference Result 1358 states and 4239 transitions. [2021-06-05 14:40:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:40:10,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:10,425 INFO L225 Difference]: With dead ends: 1358 [2021-06-05 14:40:10,425 INFO L226 Difference]: Without dead ends: 1352 [2021-06-05 14:40:10,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1083.4ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:40:10,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-06-05 14:40:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 869. [2021-06-05 14:40:10,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.443548387096774) internal successors, (2989), 868 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2989 transitions. [2021-06-05 14:40:10,436 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2989 transitions. Word has length 20 [2021-06-05 14:40:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:10,437 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2989 transitions. [2021-06-05 14:40:10,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2989 transitions. [2021-06-05 14:40:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:10,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:10,438 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:10,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4577,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:10,638 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash 278364404, now seen corresponding path program 380 times [2021-06-05 14:40:10,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:10,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054168516] [2021-06-05 14:40:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:10,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:10,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054168516] [2021-06-05 14:40:10,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054168516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:10,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833874806] [2021-06-05 14:40:10,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:10,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:10,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:10,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:10,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:10,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833874806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:10,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:10,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:10,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334965255] [2021-06-05 14:40:10,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:10,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:10,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:10,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:10,947 INFO L87 Difference]: Start difference. First operand 869 states and 2989 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:11,850 INFO L93 Difference]: Finished difference Result 1431 states and 4427 transitions. [2021-06-05 14:40:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:40:11,850 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:11,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:11,852 INFO L225 Difference]: With dead ends: 1431 [2021-06-05 14:40:11,852 INFO L226 Difference]: Without dead ends: 1431 [2021-06-05 14:40:11,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 841.8ms TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:40:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-06-05 14:40:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 863. [2021-06-05 14:40:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4419953596287702) internal successors, (2967), 862 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2967 transitions. [2021-06-05 14:40:11,864 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2967 transitions. Word has length 20 [2021-06-05 14:40:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:11,864 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2967 transitions. [2021-06-05 14:40:11,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,864 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2967 transitions. [2021-06-05 14:40:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:11,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:11,865 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:12,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4589,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:12,066 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:12,066 INFO L82 PathProgramCache]: Analyzing trace with hash 533665978, now seen corresponding path program 381 times [2021-06-05 14:40:12,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:12,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16824255] [2021-06-05 14:40:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:12,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:12,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16824255] [2021-06-05 14:40:12,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16824255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:12,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488196975] [2021-06-05 14:40:12,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:12,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:12,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:12,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:12,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:12,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488196975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:12,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:12,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:12,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102062767] [2021-06-05 14:40:12,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:12,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:12,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:12,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:12,402 INFO L87 Difference]: Start difference. First operand 863 states and 2967 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,018 INFO L93 Difference]: Finished difference Result 1315 states and 4162 transitions. [2021-06-05 14:40:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:13,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:13,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,020 INFO L225 Difference]: With dead ends: 1315 [2021-06-05 14:40:13,020 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 14:40:13,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:40:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 14:40:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 867. [2021-06-05 14:40:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.4422632794457275) internal successors, (2981), 866 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2981 transitions. [2021-06-05 14:40:13,031 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2981 transitions. Word has length 20 [2021-06-05 14:40:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,031 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2981 transitions. [2021-06-05 14:40:13,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2981 transitions. [2021-06-05 14:40:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:13,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,033 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4597,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:13,233 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1393398494, now seen corresponding path program 382 times [2021-06-05 14:40:13,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836331075] [2021-06-05 14:40:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836331075] [2021-06-05 14:40:13,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836331075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:13,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524632485] [2021-06-05 14:40:13,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:13,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:13,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:13,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524632485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:13,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:13,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:40:13,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351942613] [2021-06-05 14:40:13,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:13,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:13,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:13,573 INFO L87 Difference]: Start difference. First operand 867 states and 2981 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:14,470 INFO L93 Difference]: Finished difference Result 1285 states and 4089 transitions. [2021-06-05 14:40:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:14,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:14,472 INFO L225 Difference]: With dead ends: 1285 [2021-06-05 14:40:14,472 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 14:40:14,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 869.1ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:40:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 14:40:14,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 865. [2021-06-05 14:40:14,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.4444444444444446) internal successors, (2976), 864 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2976 transitions. [2021-06-05 14:40:14,483 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2976 transitions. Word has length 20 [2021-06-05 14:40:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:14,483 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2976 transitions. [2021-06-05 14:40:14,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2976 transitions. [2021-06-05 14:40:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:14,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:14,484 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:14,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4606,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:14,685 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash -330351898, now seen corresponding path program 383 times [2021-06-05 14:40:14,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:14,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256603370] [2021-06-05 14:40:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:14,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:14,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256603370] [2021-06-05 14:40:14,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256603370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:14,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575450607] [2021-06-05 14:40:14,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:14,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:14,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:14,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:14,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:15,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575450607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:15,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:15,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:15,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736052614] [2021-06-05 14:40:15,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:15,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:15,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:15,087 INFO L87 Difference]: Start difference. First operand 865 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:15,837 INFO L93 Difference]: Finished difference Result 1222 states and 3924 transitions. [2021-06-05 14:40:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:40:15,837 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:15,839 INFO L225 Difference]: With dead ends: 1222 [2021-06-05 14:40:15,839 INFO L226 Difference]: Without dead ends: 1222 [2021-06-05 14:40:15,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 801.6ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-05 14:40:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 856. [2021-06-05 14:40:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.449122807017544) internal successors, (2949), 855 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2949 transitions. [2021-06-05 14:40:15,849 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2949 transitions. Word has length 20 [2021-06-05 14:40:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:15,849 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2949 transitions. [2021-06-05 14:40:15,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2949 transitions. [2021-06-05 14:40:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:15,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:15,850 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:16,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4613 [2021-06-05 14:40:16,051 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:16,051 INFO L82 PathProgramCache]: Analyzing trace with hash 961990502, now seen corresponding path program 384 times [2021-06-05 14:40:16,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:16,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890025411] [2021-06-05 14:40:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:16,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:16,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890025411] [2021-06-05 14:40:16,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890025411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:16,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914197749] [2021-06-05 14:40:16,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:16,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:16,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:16,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:16,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914197749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:16,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:16,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:40:16,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763054248] [2021-06-05 14:40:16,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:16,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:16,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:16,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:16,427 INFO L87 Difference]: Start difference. First operand 856 states and 2949 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:17,132 INFO L93 Difference]: Finished difference Result 1185 states and 3842 transitions. [2021-06-05 14:40:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:40:17,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:17,134 INFO L225 Difference]: With dead ends: 1185 [2021-06-05 14:40:17,134 INFO L226 Difference]: Without dead ends: 1185 [2021-06-05 14:40:17,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 712.5ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-06-05 14:40:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 855. [2021-06-05 14:40:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.446135831381733) internal successors, (2943), 854 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2943 transitions. [2021-06-05 14:40:17,144 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2943 transitions. Word has length 20 [2021-06-05 14:40:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:17,144 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2943 transitions. [2021-06-05 14:40:17,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2943 transitions. [2021-06-05 14:40:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:17,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:17,145 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:17,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4626,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:17,346 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash -309615370, now seen corresponding path program 385 times [2021-06-05 14:40:17,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:17,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892601666] [2021-06-05 14:40:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:17,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:17,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892601666] [2021-06-05 14:40:17,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892601666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:17,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108225297] [2021-06-05 14:40:17,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:17,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:17,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:17,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108225297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:17,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:17,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:17,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287824104] [2021-06-05 14:40:17,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:17,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:17,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:17,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:17,683 INFO L87 Difference]: Start difference. First operand 855 states and 2943 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:18,714 INFO L93 Difference]: Finished difference Result 1274 states and 4040 transitions. [2021-06-05 14:40:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:18,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:18,716 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 14:40:18,716 INFO L226 Difference]: Without dead ends: 1268 [2021-06-05 14:40:18,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 998.9ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:40:18,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-06-05 14:40:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 865. [2021-06-05 14:40:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.439814814814815) internal successors, (2972), 864 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2972 transitions. [2021-06-05 14:40:18,727 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2972 transitions. Word has length 20 [2021-06-05 14:40:18,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:18,727 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2972 transitions. [2021-06-05 14:40:18,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2972 transitions. [2021-06-05 14:40:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:18,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:18,728 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:18,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4633 [2021-06-05 14:40:18,928 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2069928000, now seen corresponding path program 386 times [2021-06-05 14:40:18,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:18,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092419243] [2021-06-05 14:40:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:18,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:18,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092419243] [2021-06-05 14:40:18,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092419243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:18,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110527483] [2021-06-05 14:40:18,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:19,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:19,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:19,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:19,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:19,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110527483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:19,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:19,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:40:19,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739795101] [2021-06-05 14:40:19,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:19,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:19,273 INFO L87 Difference]: Start difference. First operand 865 states and 2972 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:20,214 INFO L93 Difference]: Finished difference Result 1209 states and 3902 transitions. [2021-06-05 14:40:20,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:20,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:20,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:20,216 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 14:40:20,216 INFO L226 Difference]: Without dead ends: 1209 [2021-06-05 14:40:20,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 923.8ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:40:20,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-06-05 14:40:20,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 855. [2021-06-05 14:40:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.446135831381733) internal successors, (2943), 854 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2943 transitions. [2021-06-05 14:40:20,226 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2943 transitions. Word has length 20 [2021-06-05 14:40:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:20,227 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2943 transitions. [2021-06-05 14:40:20,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2943 transitions. [2021-06-05 14:40:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:20,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:20,228 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:20,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4643,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:20,428 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash 185978978, now seen corresponding path program 387 times [2021-06-05 14:40:20,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:20,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133204753] [2021-06-05 14:40:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:20,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:20,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133204753] [2021-06-05 14:40:20,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133204753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:20,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790678800] [2021-06-05 14:40:20,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:20,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:20,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:20,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:20,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790678800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:20,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:20,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:20,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51404469] [2021-06-05 14:40:20,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:20,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:20,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:20,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:20,732 INFO L87 Difference]: Start difference. First operand 855 states and 2943 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:21,519 INFO L93 Difference]: Finished difference Result 1313 states and 4171 transitions. [2021-06-05 14:40:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:21,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:21,521 INFO L225 Difference]: With dead ends: 1313 [2021-06-05 14:40:21,521 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 14:40:21,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 739.2ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:40:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 14:40:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 858. [2021-06-05 14:40:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.4515752625437575) internal successors, (2958), 857 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2958 transitions. [2021-06-05 14:40:21,532 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2958 transitions. Word has length 20 [2021-06-05 14:40:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:21,533 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2958 transitions. [2021-06-05 14:40:21,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2958 transitions. [2021-06-05 14:40:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:21,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:21,534 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:21,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4654,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:21,734 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1810316746, now seen corresponding path program 388 times [2021-06-05 14:40:21,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:21,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65619975] [2021-06-05 14:40:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:21,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:21,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65619975] [2021-06-05 14:40:21,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65619975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:21,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637861190] [2021-06-05 14:40:21,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:21,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:21,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:21,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:21,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:22,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637861190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:22,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:22,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:40:22,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160525576] [2021-06-05 14:40:22,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:22,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:22,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:22,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:22,095 INFO L87 Difference]: Start difference. First operand 858 states and 2958 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:22,880 INFO L93 Difference]: Finished difference Result 1277 states and 4091 transitions. [2021-06-05 14:40:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:22,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:22,882 INFO L225 Difference]: With dead ends: 1277 [2021-06-05 14:40:22,882 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 14:40:22,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 745.8ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:40:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 14:40:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 854. [2021-06-05 14:40:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.443141852286049) internal successors, (2937), 853 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-06-05 14:40:22,893 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-06-05 14:40:22,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:22,893 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-06-05 14:40:22,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,893 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-06-05 14:40:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:22,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:22,894 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:23,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4662 [2021-06-05 14:40:23,094 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:23,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1966494310, now seen corresponding path program 389 times [2021-06-05 14:40:23,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:23,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695979732] [2021-06-05 14:40:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:23,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:23,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695979732] [2021-06-05 14:40:23,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695979732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:23,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188890519] [2021-06-05 14:40:23,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:23,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:23,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:23,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:23,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188890519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:23,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:23,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:23,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506515753] [2021-06-05 14:40:23,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:23,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:23,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:23,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:23,431 INFO L87 Difference]: Start difference. First operand 854 states and 2937 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:24,208 INFO L93 Difference]: Finished difference Result 1185 states and 3822 transitions. [2021-06-05 14:40:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:24,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:24,209 INFO L225 Difference]: With dead ends: 1185 [2021-06-05 14:40:24,209 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 14:40:24,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 782.2ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:40:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 14:40:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 856. [2021-06-05 14:40:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.4432748538011695) internal successors, (2944), 855 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2944 transitions. [2021-06-05 14:40:24,219 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2944 transitions. Word has length 20 [2021-06-05 14:40:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:24,219 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2944 transitions. [2021-06-05 14:40:24,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2944 transitions. [2021-06-05 14:40:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:24,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:24,221 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:24,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4671,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:24,421 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:24,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:24,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1577072548, now seen corresponding path program 390 times [2021-06-05 14:40:24,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:24,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878264322] [2021-06-05 14:40:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:24,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:24,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878264322] [2021-06-05 14:40:24,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878264322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:24,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65849225] [2021-06-05 14:40:24,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:24,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:40:24,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:24,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65849225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:24,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:24,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:24,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785590821] [2021-06-05 14:40:24,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:24,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:24,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:24,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:24,781 INFO L87 Difference]: Start difference. First operand 856 states and 2944 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:25,810 INFO L93 Difference]: Finished difference Result 1214 states and 3884 transitions. [2021-06-05 14:40:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:25,811 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 14:40:25,812 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 14:40:25,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1025.2ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:40:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 14:40:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 866. [2021-06-05 14:40:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.436994219653179) internal successors, (2973), 865 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2973 transitions. [2021-06-05 14:40:25,822 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2973 transitions. Word has length 20 [2021-06-05 14:40:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:25,822 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2973 transitions. [2021-06-05 14:40:25,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2973 transitions. [2021-06-05 14:40:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:25,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:25,823 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:26,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4678 [2021-06-05 14:40:26,024 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:26,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:26,024 INFO L82 PathProgramCache]: Analyzing trace with hash 802470822, now seen corresponding path program 391 times [2021-06-05 14:40:26,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:26,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008435345] [2021-06-05 14:40:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:26,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:26,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008435345] [2021-06-05 14:40:26,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008435345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:26,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481898074] [2021-06-05 14:40:26,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:26,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:26,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:26,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481898074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:26,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:26,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:40:26,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436525847] [2021-06-05 14:40:26,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:26,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:26,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:26,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:26,382 INFO L87 Difference]: Start difference. First operand 866 states and 2973 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:27,214 INFO L93 Difference]: Finished difference Result 1143 states and 3731 transitions. [2021-06-05 14:40:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:27,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:27,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:27,215 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 14:40:27,215 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 14:40:27,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 841.3ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 14:40:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 854. [2021-06-05 14:40:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.443141852286049) internal successors, (2937), 853 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-06-05 14:40:27,226 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-06-05 14:40:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:27,226 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-06-05 14:40:27,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-06-05 14:40:27,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:27,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:27,227 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:27,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4685,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:27,427 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2039602932, now seen corresponding path program 392 times [2021-06-05 14:40:27,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:27,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085570062] [2021-06-05 14:40:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:27,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:27,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085570062] [2021-06-05 14:40:27,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085570062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:27,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259885672] [2021-06-05 14:40:27,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:27,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:27,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:27,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:27,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:27,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259885672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:27,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:27,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:27,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880454240] [2021-06-05 14:40:27,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:27,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:27,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:27,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:27,717 INFO L87 Difference]: Start difference. First operand 854 states and 2937 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:28,205 INFO L93 Difference]: Finished difference Result 1208 states and 3931 transitions. [2021-06-05 14:40:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:28,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:28,207 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 14:40:28,207 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 14:40:28,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:40:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 14:40:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 857. [2021-06-05 14:40:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.4485981308411215) internal successors, (2952), 856 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2952 transitions. [2021-06-05 14:40:28,218 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2952 transitions. Word has length 20 [2021-06-05 14:40:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:28,218 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2952 transitions. [2021-06-05 14:40:28,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2952 transitions. [2021-06-05 14:40:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:28,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:28,219 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:28,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4692 [2021-06-05 14:40:28,419 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:28,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1503963926, now seen corresponding path program 393 times [2021-06-05 14:40:28,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:28,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435944533] [2021-06-05 14:40:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:28,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:28,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435944533] [2021-06-05 14:40:28,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435944533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:28,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130133811] [2021-06-05 14:40:28,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:28,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:28,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:28,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:28,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130133811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:28,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:28,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:28,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668987228] [2021-06-05 14:40:28,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:28,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:28,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:28,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:28,732 INFO L87 Difference]: Start difference. First operand 857 states and 2952 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:29,327 INFO L93 Difference]: Finished difference Result 1241 states and 4014 transitions. [2021-06-05 14:40:29,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:29,329 INFO L225 Difference]: With dead ends: 1241 [2021-06-05 14:40:29,329 INFO L226 Difference]: Without dead ends: 1241 [2021-06-05 14:40:29,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:40:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-05 14:40:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 860. [2021-06-05 14:40:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.454016298020955) internal successors, (2967), 859 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2967 transitions. [2021-06-05 14:40:29,340 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2967 transitions. Word has length 20 [2021-06-05 14:40:29,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:29,340 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2967 transitions. [2021-06-05 14:40:29,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:29,340 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2967 transitions. [2021-06-05 14:40:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:29,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:29,341 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:29,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4697,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:29,542 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:29,542 INFO L82 PathProgramCache]: Analyzing trace with hash 120373842, now seen corresponding path program 394 times [2021-06-05 14:40:29,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:29,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036090064] [2021-06-05 14:40:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:29,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:29,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036090064] [2021-06-05 14:40:29,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036090064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555512255] [2021-06-05 14:40:29,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:29,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:29,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:29,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:29,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:29,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555512255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:29,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:29,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:40:29,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863477653] [2021-06-05 14:40:29,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:29,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:29,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:29,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:29,878 INFO L87 Difference]: Start difference. First operand 860 states and 2967 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:30,529 INFO L93 Difference]: Finished difference Result 1199 states and 3919 transitions. [2021-06-05 14:40:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:30,531 INFO L225 Difference]: With dead ends: 1199 [2021-06-05 14:40:30,531 INFO L226 Difference]: Without dead ends: 1199 [2021-06-05 14:40:30,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 641.9ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:30,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-05 14:40:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 854. [2021-06-05 14:40:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.443141852286049) internal successors, (2937), 853 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-06-05 14:40:30,545 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-06-05 14:40:30,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:30,545 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-06-05 14:40:30,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-06-05 14:40:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:30,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:30,547 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:30,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4704 [2021-06-05 14:40:30,761 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1106639882, now seen corresponding path program 395 times [2021-06-05 14:40:30,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:30,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532564084] [2021-06-05 14:40:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:30,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:30,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532564084] [2021-06-05 14:40:30,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532564084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:30,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574446847] [2021-06-05 14:40:30,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:30,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:30,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:30,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:30,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:31,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574446847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:31,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:31,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:40:31,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924503353] [2021-06-05 14:40:31,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:40:31,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:31,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:40:31,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:31,057 INFO L87 Difference]: Start difference. First operand 854 states and 2937 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:31,621 INFO L93 Difference]: Finished difference Result 1151 states and 3726 transitions. [2021-06-05 14:40:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:40:31,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:31,623 INFO L225 Difference]: With dead ends: 1151 [2021-06-05 14:40:31,623 INFO L226 Difference]: Without dead ends: 1133 [2021-06-05 14:40:31,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 564.0ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-05 14:40:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 856. [2021-06-05 14:40:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.44093567251462) internal successors, (2942), 855 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2942 transitions. [2021-06-05 14:40:31,633 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2942 transitions. Word has length 20 [2021-06-05 14:40:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:31,633 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2942 transitions. [2021-06-05 14:40:31,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2942 transitions. [2021-06-05 14:40:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:31,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:31,634 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:31,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4711,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:31,835 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash 905716220, now seen corresponding path program 396 times [2021-06-05 14:40:31,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:31,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325736005] [2021-06-05 14:40:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:31,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:31,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325736005] [2021-06-05 14:40:31,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325736005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:31,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153058273] [2021-06-05 14:40:31,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:32,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:40:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:32,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153058273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:32,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:32,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:32,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098255237] [2021-06-05 14:40:32,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:32,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:32,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:32,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:32,165 INFO L87 Difference]: Start difference. First operand 856 states and 2942 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:32,815 INFO L93 Difference]: Finished difference Result 1143 states and 3702 transitions. [2021-06-05 14:40:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:32,817 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 14:40:32,817 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 14:40:32,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 653.3ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 14:40:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 858. [2021-06-05 14:40:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.441073512252042) internal successors, (2949), 857 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2949 transitions. [2021-06-05 14:40:32,827 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2949 transitions. Word has length 20 [2021-06-05 14:40:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:32,827 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2949 transitions. [2021-06-05 14:40:32,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2949 transitions. [2021-06-05 14:40:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:32,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:32,828 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:33,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4718 [2021-06-05 14:40:33,028 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1657116658, now seen corresponding path program 397 times [2021-06-05 14:40:33,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:33,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112856363] [2021-06-05 14:40:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:33,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:33,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112856363] [2021-06-05 14:40:33,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112856363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:33,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173941636] [2021-06-05 14:40:33,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:33,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:33,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173941636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:33,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:33,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:33,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535591348] [2021-06-05 14:40:33,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:33,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:33,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:33,342 INFO L87 Difference]: Start difference. First operand 858 states and 2949 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:34,145 INFO L93 Difference]: Finished difference Result 1172 states and 3764 transitions. [2021-06-05 14:40:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:34,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:34,147 INFO L225 Difference]: With dead ends: 1172 [2021-06-05 14:40:34,147 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 14:40:34,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 793.0ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:40:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 14:40:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 868. [2021-06-05 14:40:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.4348327566320647) internal successors, (2978), 867 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:34,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2978 transitions. [2021-06-05 14:40:34,157 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2978 transitions. Word has length 20 [2021-06-05 14:40:34,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:34,157 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2978 transitions. [2021-06-05 14:40:34,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2978 transitions. [2021-06-05 14:40:34,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:34,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:34,158 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:34,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4727,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:34,359 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:34,359 INFO L82 PathProgramCache]: Analyzing trace with hash -258307268, now seen corresponding path program 398 times [2021-06-05 14:40:34,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:34,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664952786] [2021-06-05 14:40:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:34,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:34,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664952786] [2021-06-05 14:40:34,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664952786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:34,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649384057] [2021-06-05 14:40:34,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:34,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:34,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:34,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:34,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:34,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649384057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:34,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:34,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:40:34,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351255415] [2021-06-05 14:40:34,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:34,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:34,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:34,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:34,733 INFO L87 Difference]: Start difference. First operand 868 states and 2978 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,214 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-05 14:40:35,351 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-05 14:40:35,472 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-06-05 14:40:35,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:35,545 INFO L93 Difference]: Finished difference Result 1114 states and 3656 transitions. [2021-06-05 14:40:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:40:35,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:35,546 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 14:40:35,547 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 14:40:35,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 859.0ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 14:40:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 856. [2021-06-05 14:40:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.44093567251462) internal successors, (2942), 855 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2942 transitions. [2021-06-05 14:40:35,556 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2942 transitions. Word has length 20 [2021-06-05 14:40:35,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:35,557 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2942 transitions. [2021-06-05 14:40:35,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2942 transitions. [2021-06-05 14:40:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:35,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:35,558 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:35,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4735,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:35,758 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:35,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:35,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1245686878, now seen corresponding path program 399 times [2021-06-05 14:40:35,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:35,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031765005] [2021-06-05 14:40:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:35,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:35,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031765005] [2021-06-05 14:40:35,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031765005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:35,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297728712] [2021-06-05 14:40:35,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:35,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:35,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:35,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:36,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297728712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:36,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:36,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:40:36,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914275972] [2021-06-05 14:40:36,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:40:36,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:36,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:40:36,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:36,069 INFO L87 Difference]: Start difference. First operand 856 states and 2942 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:36,457 INFO L93 Difference]: Finished difference Result 1271 states and 4076 transitions. [2021-06-05 14:40:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:40:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:36,459 INFO L225 Difference]: With dead ends: 1271 [2021-06-05 14:40:36,459 INFO L226 Difference]: Without dead ends: 1271 [2021-06-05 14:40:36,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-05 14:40:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 849. [2021-06-05 14:40:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4351415094339623) internal successors, (2913), 848 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2913 transitions. [2021-06-05 14:40:36,470 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2913 transitions. Word has length 20 [2021-06-05 14:40:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:36,470 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2913 transitions. [2021-06-05 14:40:36,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2913 transitions. [2021-06-05 14:40:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:36,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:36,472 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:36,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4747,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:36,672 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:36,672 INFO L82 PathProgramCache]: Analyzing trace with hash 766669224, now seen corresponding path program 400 times [2021-06-05 14:40:36,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:36,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060733538] [2021-06-05 14:40:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:36,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:36,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060733538] [2021-06-05 14:40:36,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060733538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:36,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570056160] [2021-06-05 14:40:36,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:36,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:36,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:36,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:36,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:36,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570056160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:36,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:36,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:36,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652541958] [2021-06-05 14:40:36,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:36,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:36,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:36,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:36,968 INFO L87 Difference]: Start difference. First operand 849 states and 2913 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:37,361 INFO L93 Difference]: Finished difference Result 1219 states and 3951 transitions. [2021-06-05 14:40:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:40:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:37,363 INFO L225 Difference]: With dead ends: 1219 [2021-06-05 14:40:37,363 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 14:40:37,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 386.6ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 14:40:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 848. [2021-06-05 14:40:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.436835891381346) internal successors, (2911), 847 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2911 transitions. [2021-06-05 14:40:37,374 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2911 transitions. Word has length 20 [2021-06-05 14:40:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:37,375 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2911 transitions. [2021-06-05 14:40:37,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2911 transitions. [2021-06-05 14:40:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:37,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:37,376 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:37,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4753,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:37,576 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1518069662, now seen corresponding path program 401 times [2021-06-05 14:40:37,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:37,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181563835] [2021-06-05 14:40:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:37,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:37,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181563835] [2021-06-05 14:40:37,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181563835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:37,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971573811] [2021-06-05 14:40:37,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:37,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:37,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:37,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:37,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971573811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:37,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:37,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:40:37,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921917986] [2021-06-05 14:40:37,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:37,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:37,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:37,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:37,896 INFO L87 Difference]: Start difference. First operand 848 states and 2911 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:38,319 INFO L93 Difference]: Finished difference Result 1239 states and 3990 transitions. [2021-06-05 14:40:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:40:38,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:38,321 INFO L225 Difference]: With dead ends: 1239 [2021-06-05 14:40:38,321 INFO L226 Difference]: Without dead ends: 1239 [2021-06-05 14:40:38,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 423.7ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:38,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-06-05 14:40:38,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 847. [2021-06-05 14:40:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.434988179669031) internal successors, (2906), 846 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2906 transitions. [2021-06-05 14:40:38,331 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2906 transitions. Word has length 20 [2021-06-05 14:40:38,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:38,332 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 2906 transitions. [2021-06-05 14:40:38,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2906 transitions. [2021-06-05 14:40:38,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:38,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:38,333 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:38,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4758,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:38,533 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1152559866, now seen corresponding path program 402 times [2021-06-05 14:40:38,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:38,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921749666] [2021-06-05 14:40:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:38,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:38,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921749666] [2021-06-05 14:40:38,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921749666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:38,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955595853] [2021-06-05 14:40:38,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:38,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:38,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:38,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:38,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:38,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955595853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:38,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:38,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:40:38,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350258503] [2021-06-05 14:40:38,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:38,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:38,850 INFO L87 Difference]: Start difference. First operand 847 states and 2906 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:39,323 INFO L93 Difference]: Finished difference Result 1197 states and 3895 transitions. [2021-06-05 14:40:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:40:39,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:39,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:39,325 INFO L225 Difference]: With dead ends: 1197 [2021-06-05 14:40:39,325 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 14:40:39,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 426.3ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:39,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 14:40:39,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 830. [2021-06-05 14:40:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-05 14:40:39,335 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-05 14:40:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:39,335 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-05 14:40:39,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-05 14:40:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:39,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:39,336 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:39,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4764 [2021-06-05 14:40:39,537 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash 55260776, now seen corresponding path program 403 times [2021-06-05 14:40:39,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:39,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273270264] [2021-06-05 14:40:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:39,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:39,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273270264] [2021-06-05 14:40:39,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273270264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:39,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128147435] [2021-06-05 14:40:39,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:39,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:39,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128147435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:39,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:39,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:40:39,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750637886] [2021-06-05 14:40:39,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:40:39,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:39,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:40:39,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:40:39,742 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:39,975 INFO L93 Difference]: Finished difference Result 1184 states and 3800 transitions. [2021-06-05 14:40:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:39,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:39,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:39,977 INFO L225 Difference]: With dead ends: 1184 [2021-06-05 14:40:39,977 INFO L226 Difference]: Without dead ends: 1184 [2021-06-05 14:40:39,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-06-05 14:40:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 835. [2021-06-05 14:40:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.4268585131894485) internal successors, (2858), 834 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2858 transitions. [2021-06-05 14:40:39,987 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2858 transitions. Word has length 20 [2021-06-05 14:40:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:39,987 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2858 transitions. [2021-06-05 14:40:39,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2858 transitions. [2021-06-05 14:40:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:39,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:39,988 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:40,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4770 [2021-06-05 14:40:40,188 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:40,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1613471838, now seen corresponding path program 404 times [2021-06-05 14:40:40,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:40,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153977822] [2021-06-05 14:40:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:40,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:40,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153977822] [2021-06-05 14:40:40,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153977822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:40,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12180814] [2021-06-05 14:40:40,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:40,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:40,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:40,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12180814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:40,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:40,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:40:40,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797844217] [2021-06-05 14:40:40,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:40:40,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:40,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:40:40,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:40:40,420 INFO L87 Difference]: Start difference. First operand 835 states and 2858 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:40,814 INFO L93 Difference]: Finished difference Result 1264 states and 4000 transitions. [2021-06-05 14:40:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:40,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:40,816 INFO L225 Difference]: With dead ends: 1264 [2021-06-05 14:40:40,816 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 14:40:40,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 14:40:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 838. [2021-06-05 14:40:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.4241338112305852) internal successors, (2866), 837 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2866 transitions. [2021-06-05 14:40:40,826 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2866 transitions. Word has length 20 [2021-06-05 14:40:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:40,826 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2866 transitions. [2021-06-05 14:40:40,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2866 transitions. [2021-06-05 14:40:40,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:40,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:40,827 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:41,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4772 [2021-06-05 14:40:41,028 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash 827417818, now seen corresponding path program 405 times [2021-06-05 14:40:41,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:41,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028210210] [2021-06-05 14:40:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:41,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:41,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028210210] [2021-06-05 14:40:41,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028210210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:41,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45598721] [2021-06-05 14:40:41,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:41,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:41,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45598721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:41,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:41,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:40:41,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561994365] [2021-06-05 14:40:41,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:41,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:41,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:41,291 INFO L87 Difference]: Start difference. First operand 838 states and 2866 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:41,587 INFO L93 Difference]: Finished difference Result 1151 states and 3695 transitions. [2021-06-05 14:40:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:41,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:41,589 INFO L225 Difference]: With dead ends: 1151 [2021-06-05 14:40:41,589 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 14:40:41,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 14:40:41,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 851. [2021-06-05 14:40:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.418823529411765) internal successors, (2906), 850 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2906 transitions. [2021-06-05 14:40:41,598 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2906 transitions. Word has length 20 [2021-06-05 14:40:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:41,598 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2906 transitions. [2021-06-05 14:40:41,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2906 transitions. [2021-06-05 14:40:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:41,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:41,600 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:41,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4775,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:41,800 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:41,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1973137240, now seen corresponding path program 406 times [2021-06-05 14:40:41,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:41,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804646644] [2021-06-05 14:40:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:41,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:41,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804646644] [2021-06-05 14:40:41,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804646644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:41,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015446356] [2021-06-05 14:40:41,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:41,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:41,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:41,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:41,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:42,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015446356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:42,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:42,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:40:42,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129148297] [2021-06-05 14:40:42,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:40:42,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:42,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:40:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:40:42,029 INFO L87 Difference]: Start difference. First operand 851 states and 2906 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:42,730 INFO L93 Difference]: Finished difference Result 1375 states and 4282 transitions. [2021-06-05 14:40:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:40:42,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:42,732 INFO L225 Difference]: With dead ends: 1375 [2021-06-05 14:40:42,732 INFO L226 Difference]: Without dead ends: 1375 [2021-06-05 14:40:42,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 578.8ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:40:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-06-05 14:40:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 851. [2021-06-05 14:40:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.418823529411765) internal successors, (2906), 850 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2906 transitions. [2021-06-05 14:40:42,743 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2906 transitions. Word has length 20 [2021-06-05 14:40:42,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:42,743 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2906 transitions. [2021-06-05 14:40:42,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2906 transitions. [2021-06-05 14:40:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:42,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:42,744 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:42,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4781 [2021-06-05 14:40:42,945 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:42,945 INFO L82 PathProgramCache]: Analyzing trace with hash 827922334, now seen corresponding path program 407 times [2021-06-05 14:40:42,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:42,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196624712] [2021-06-05 14:40:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:42,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:42,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196624712] [2021-06-05 14:40:42,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196624712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:42,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747131964] [2021-06-05 14:40:42,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:43,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:43,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:43,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:43,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747131964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:43,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:43,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:40:43,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44487209] [2021-06-05 14:40:43,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:40:43,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:43,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:40:43,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:40:43,166 INFO L87 Difference]: Start difference. First operand 851 states and 2906 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:43,505 INFO L93 Difference]: Finished difference Result 1253 states and 3969 transitions. [2021-06-05 14:40:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:43,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:43,507 INFO L225 Difference]: With dead ends: 1253 [2021-06-05 14:40:43,507 INFO L226 Difference]: Without dead ends: 1247 [2021-06-05 14:40:43,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-05 14:40:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 851. [2021-06-05 14:40:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.415294117647059) internal successors, (2903), 850 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2903 transitions. [2021-06-05 14:40:43,517 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2903 transitions. Word has length 20 [2021-06-05 14:40:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:43,517 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2903 transitions. [2021-06-05 14:40:43,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2903 transitions. [2021-06-05 14:40:43,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:43,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:43,518 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:43,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4786,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:43,719 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash -613020500, now seen corresponding path program 408 times [2021-06-05 14:40:43,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:43,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453314144] [2021-06-05 14:40:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:43,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:43,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453314144] [2021-06-05 14:40:43,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453314144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:43,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131862094] [2021-06-05 14:40:43,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:43,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:43,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:43,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:43,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:43,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131862094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:43,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:43,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:40:43,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286727276] [2021-06-05 14:40:43,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:43,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:43,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:43,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:43,989 INFO L87 Difference]: Start difference. First operand 851 states and 2903 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:44,176 INFO L93 Difference]: Finished difference Result 1114 states and 3618 transitions. [2021-06-05 14:40:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:40:44,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:44,178 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 14:40:44,178 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 14:40:44,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 14:40:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 830. [2021-06-05 14:40:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-05 14:40:44,188 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-05 14:40:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:44,188 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-05 14:40:44,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-05 14:40:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:44,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:44,189 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:44,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4790 [2021-06-05 14:40:44,390 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:44,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:44,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1170572698, now seen corresponding path program 409 times [2021-06-05 14:40:44,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:44,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700710383] [2021-06-05 14:40:44,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:44,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:44,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700710383] [2021-06-05 14:40:44,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700710383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:44,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639094533] [2021-06-05 14:40:44,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:44,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:44,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:44,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639094533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:44,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:44,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:40:44,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851097180] [2021-06-05 14:40:44,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:40:44,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:44,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:40:44,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:40:44,615 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:44,887 INFO L93 Difference]: Finished difference Result 1119 states and 3616 transitions. [2021-06-05 14:40:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:44,888 INFO L225 Difference]: With dead ends: 1119 [2021-06-05 14:40:44,888 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 14:40:44,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:44,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 14:40:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 833. [2021-06-05 14:40:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4290865384615383) internal successors, (2853), 832 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2853 transitions. [2021-06-05 14:40:44,898 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2853 transitions. Word has length 20 [2021-06-05 14:40:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:44,898 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2853 transitions. [2021-06-05 14:40:44,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,898 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2853 transitions. [2021-06-05 14:40:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:44,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:44,899 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:45,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4797,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:45,099 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:45,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1878930916, now seen corresponding path program 410 times [2021-06-05 14:40:45,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:45,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049244740] [2021-06-05 14:40:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:45,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:45,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049244740] [2021-06-05 14:40:45,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049244740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:45,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154165906] [2021-06-05 14:40:45,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:45,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:45,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:45,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:45,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154165906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:45,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:45,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:40:45,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752074540] [2021-06-05 14:40:45,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:40:45,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:45,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:40:45,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:40:45,398 INFO L87 Difference]: Start difference. First operand 833 states and 2853 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:45,787 INFO L93 Difference]: Finished difference Result 1161 states and 3742 transitions. [2021-06-05 14:40:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:45,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:45,789 INFO L225 Difference]: With dead ends: 1161 [2021-06-05 14:40:45,789 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 14:40:45,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:45,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 14:40:45,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 830. [2021-06-05 14:40:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-05 14:40:45,799 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-05 14:40:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:45,799 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-05 14:40:45,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-05 14:40:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:45,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:45,800 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:46,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4799,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:46,000 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash -227853204, now seen corresponding path program 411 times [2021-06-05 14:40:46,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:46,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245831200] [2021-06-05 14:40:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:46,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:46,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245831200] [2021-06-05 14:40:46,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245831200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:46,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004641239] [2021-06-05 14:40:46,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:46,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:46,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:46,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:46,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004641239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:46,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:46,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:40:46,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472704228] [2021-06-05 14:40:46,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:40:46,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:46,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:40:46,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:40:46,243 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:46,536 INFO L93 Difference]: Finished difference Result 1144 states and 3661 transitions. [2021-06-05 14:40:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:46,538 INFO L225 Difference]: With dead ends: 1144 [2021-06-05 14:40:46,538 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 14:40:46,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 14:40:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 830. [2021-06-05 14:40:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-06-05 14:40:46,548 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-06-05 14:40:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:46,548 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-06-05 14:40:46,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-06-05 14:40:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:46,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:46,549 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:46,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4806,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:46,750 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:46,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1183905348, now seen corresponding path program 412 times [2021-06-05 14:40:46,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:46,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412059380] [2021-06-05 14:40:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:46,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:46,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412059380] [2021-06-05 14:40:46,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412059380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:46,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076045737] [2021-06-05 14:40:46,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:46,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:46,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:46,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:46,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:46,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076045737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:46,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:46,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:40:46,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936292555] [2021-06-05 14:40:46,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:40:46,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:46,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:40:46,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:40:46,996 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:47,298 INFO L93 Difference]: Finished difference Result 1029 states and 3385 transitions. [2021-06-05 14:40:47,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:47,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:47,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:47,299 INFO L225 Difference]: With dead ends: 1029 [2021-06-05 14:40:47,299 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 14:40:47,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:47,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 14:40:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 819. [2021-06-05 14:40:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4388753056234718) internal successors, (2813), 818 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2813 transitions. [2021-06-05 14:40:47,310 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2813 transitions. Word has length 20 [2021-06-05 14:40:47,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:47,310 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2813 transitions. [2021-06-05 14:40:47,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,310 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2813 transitions. [2021-06-05 14:40:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:47,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:47,311 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:47,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4811 [2021-06-05 14:40:47,512 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:47,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:47,512 INFO L82 PathProgramCache]: Analyzing trace with hash -343837518, now seen corresponding path program 413 times [2021-06-05 14:40:47,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:47,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431475687] [2021-06-05 14:40:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:47,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:47,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431475687] [2021-06-05 14:40:47,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431475687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:47,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647985891] [2021-06-05 14:40:47,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:47,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:47,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:47,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:47,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:47,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647985891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:47,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:47,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:40:47,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565780969] [2021-06-05 14:40:47,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:40:47,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:47,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:40:47,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:40:47,757 INFO L87 Difference]: Start difference. First operand 819 states and 2813 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:48,066 INFO L93 Difference]: Finished difference Result 1469 states and 4603 transitions. [2021-06-05 14:40:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:48,068 INFO L225 Difference]: With dead ends: 1469 [2021-06-05 14:40:48,068 INFO L226 Difference]: Without dead ends: 1469 [2021-06-05 14:40:48,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-06-05 14:40:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 826. [2021-06-05 14:40:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.443636363636364) internal successors, (2841), 825 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2841 transitions. [2021-06-05 14:40:48,079 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2841 transitions. Word has length 20 [2021-06-05 14:40:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:48,079 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2841 transitions. [2021-06-05 14:40:48,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2841 transitions. [2021-06-05 14:40:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:48,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:48,080 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:48,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4818,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:48,281 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1214373544, now seen corresponding path program 414 times [2021-06-05 14:40:48,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:48,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794221017] [2021-06-05 14:40:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:48,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:48,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794221017] [2021-06-05 14:40:48,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794221017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:48,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764059348] [2021-06-05 14:40:48,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:48,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:40:48,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:48,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:48,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:48,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764059348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:48,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:48,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:40:48,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792210284] [2021-06-05 14:40:48,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:48,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:48,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:48,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:48,549 INFO L87 Difference]: Start difference. First operand 826 states and 2841 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:49,075 INFO L93 Difference]: Finished difference Result 1609 states and 4942 transitions. [2021-06-05 14:40:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:40:49,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:49,077 INFO L225 Difference]: With dead ends: 1609 [2021-06-05 14:40:49,077 INFO L226 Difference]: Without dead ends: 1609 [2021-06-05 14:40:49,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:40:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-06-05 14:40:49,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 832. [2021-06-05 14:40:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.441636582430806) internal successors, (2860), 831 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2860 transitions. [2021-06-05 14:40:49,089 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2860 transitions. Word has length 20 [2021-06-05 14:40:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:49,089 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2860 transitions. [2021-06-05 14:40:49,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2860 transitions. [2021-06-05 14:40:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:49,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:49,090 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:49,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4822,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:49,291 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:49,291 INFO L82 PathProgramCache]: Analyzing trace with hash 428319524, now seen corresponding path program 415 times [2021-06-05 14:40:49,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:49,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825516544] [2021-06-05 14:40:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:49,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:49,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825516544] [2021-06-05 14:40:49,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825516544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:49,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693699722] [2021-06-05 14:40:49,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:49,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:49,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:49,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693699722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:49,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:49,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:40:49,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137241756] [2021-06-05 14:40:49,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:40:49,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:49,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:40:49,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:49,645 INFO L87 Difference]: Start difference. First operand 832 states and 2860 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:50,115 INFO L93 Difference]: Finished difference Result 1334 states and 4217 transitions. [2021-06-05 14:40:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:50,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:50,117 INFO L225 Difference]: With dead ends: 1334 [2021-06-05 14:40:50,117 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 14:40:50,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 14:40:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 845. [2021-06-05 14:40:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.4360189573459716) internal successors, (2900), 844 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2900 transitions. [2021-06-05 14:40:50,128 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2900 transitions. Word has length 20 [2021-06-05 14:40:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:50,128 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2900 transitions. [2021-06-05 14:40:50,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2900 transitions. [2021-06-05 14:40:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:50,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:50,129 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:50,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4827 [2021-06-05 14:40:50,330 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:50,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1922731762, now seen corresponding path program 416 times [2021-06-05 14:40:50,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:50,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221310970] [2021-06-05 14:40:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:50,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:50,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221310970] [2021-06-05 14:40:50,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221310970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:50,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751015262] [2021-06-05 14:40:50,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:50,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:50,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:50,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:50,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:50,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751015262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:50,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:50,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:40:50,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581786120] [2021-06-05 14:40:50,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:50,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:50,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:50,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:50,622 INFO L87 Difference]: Start difference. First operand 845 states and 2900 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:51,614 INFO L93 Difference]: Finished difference Result 1808 states and 5449 transitions. [2021-06-05 14:40:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:40:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:51,616 INFO L225 Difference]: With dead ends: 1808 [2021-06-05 14:40:51,616 INFO L226 Difference]: Without dead ends: 1808 [2021-06-05 14:40:51,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 885.3ms TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:40:51,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-06-05 14:40:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 848. [2021-06-05 14:40:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.4403778040141675) internal successors, (2914), 847 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2914 transitions. [2021-06-05 14:40:51,630 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2914 transitions. Word has length 20 [2021-06-05 14:40:51,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:51,630 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2914 transitions. [2021-06-05 14:40:51,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2914 transitions. [2021-06-05 14:40:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:51,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:51,631 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:51,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4836 [2021-06-05 14:40:51,832 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:51,832 INFO L82 PathProgramCache]: Analyzing trace with hash 428824040, now seen corresponding path program 417 times [2021-06-05 14:40:51,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:51,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384329333] [2021-06-05 14:40:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:51,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:51,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384329333] [2021-06-05 14:40:51,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384329333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:51,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350828262] [2021-06-05 14:40:51,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:51,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:51,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:51,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:52,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350828262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:52,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:52,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:40:52,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764824154] [2021-06-05 14:40:52,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:52,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:52,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:52,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:52,088 INFO L87 Difference]: Start difference. First operand 848 states and 2914 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:52,456 INFO L93 Difference]: Finished difference Result 1465 states and 4586 transitions. [2021-06-05 14:40:52,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:52,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:52,458 INFO L225 Difference]: With dead ends: 1465 [2021-06-05 14:40:52,458 INFO L226 Difference]: Without dead ends: 1459 [2021-06-05 14:40:52,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-06-05 14:40:52,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 854. [2021-06-05 14:40:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4279015240328254) internal successors, (2924), 853 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2924 transitions. [2021-06-05 14:40:52,469 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2924 transitions. Word has length 20 [2021-06-05 14:40:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:52,469 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2924 transitions. [2021-06-05 14:40:52,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,469 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2924 transitions. [2021-06-05 14:40:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:52,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:52,470 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:52,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4844,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:52,671 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:52,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:52,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1012118794, now seen corresponding path program 418 times [2021-06-05 14:40:52,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:52,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868908100] [2021-06-05 14:40:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:52,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868908100] [2021-06-05 14:40:52,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868908100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608527493] [2021-06-05 14:40:52,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:52,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:52,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:52,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:52,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:52,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608527493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:52,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:52,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:40:52,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621181362] [2021-06-05 14:40:52,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:40:52,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:52,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:40:52,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:52,977 INFO L87 Difference]: Start difference. First operand 854 states and 2924 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:53,318 INFO L93 Difference]: Finished difference Result 1306 states and 4167 transitions. [2021-06-05 14:40:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:40:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:53,319 INFO L225 Difference]: With dead ends: 1306 [2021-06-05 14:40:53,319 INFO L226 Difference]: Without dead ends: 1306 [2021-06-05 14:40:53,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-06-05 14:40:53,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 833. [2021-06-05 14:40:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4447115384615383) internal successors, (2866), 832 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2866 transitions. [2021-06-05 14:40:53,330 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2866 transitions. Word has length 20 [2021-06-05 14:40:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:53,330 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2866 transitions. [2021-06-05 14:40:53,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2866 transitions. [2021-06-05 14:40:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:53,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:53,331 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:53,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4852,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:53,531 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash -120644928, now seen corresponding path program 419 times [2021-06-05 14:40:53,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:53,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011235986] [2021-06-05 14:40:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:53,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:53,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011235986] [2021-06-05 14:40:53,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011235986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:53,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148654727] [2021-06-05 14:40:53,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:53,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:53,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:53,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:53,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:53,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148654727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:53,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:53,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:40:53,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844166030] [2021-06-05 14:40:53,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:53,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:53,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:53,818 INFO L87 Difference]: Start difference. First operand 833 states and 2866 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:54,165 INFO L93 Difference]: Finished difference Result 1229 states and 3953 transitions. [2021-06-05 14:40:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:40:54,165 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:54,167 INFO L225 Difference]: With dead ends: 1229 [2021-06-05 14:40:54,167 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 14:40:54,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 14:40:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 829. [2021-06-05 14:40:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4444444444444446) internal successors, (2852), 828 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2852 transitions. [2021-06-05 14:40:54,177 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2852 transitions. Word has length 20 [2021-06-05 14:40:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:54,177 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2852 transitions. [2021-06-05 14:40:54,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2852 transitions. [2021-06-05 14:40:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:54,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:54,178 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:54,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4859 [2021-06-05 14:40:54,379 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:54,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:54,379 INFO L82 PathProgramCache]: Analyzing trace with hash 197477672, now seen corresponding path program 420 times [2021-06-05 14:40:54,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:54,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370060451] [2021-06-05 14:40:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:54,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:54,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370060451] [2021-06-05 14:40:54,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370060451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:54,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029106178] [2021-06-05 14:40:54,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:54,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:40:54,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:54,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:54,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:54,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029106178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:54,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:54,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:40:54,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862817361] [2021-06-05 14:40:54,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:54,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:54,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:54,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:54,699 INFO L87 Difference]: Start difference. First operand 829 states and 2852 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:54,988 INFO L93 Difference]: Finished difference Result 1475 states and 4621 transitions. [2021-06-05 14:40:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:54,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:54,990 INFO L225 Difference]: With dead ends: 1475 [2021-06-05 14:40:54,990 INFO L226 Difference]: Without dead ends: 1475 [2021-06-05 14:40:54,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-05 14:40:54,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 816. [2021-06-05 14:40:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.4478527607361964) internal successors, (2810), 815 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:55,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2810 transitions. [2021-06-05 14:40:55,001 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2810 transitions. Word has length 20 [2021-06-05 14:40:55,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:55,001 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2810 transitions. [2021-06-05 14:40:55,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2810 transitions. [2021-06-05 14:40:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:55,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:55,002 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:55,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4866,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:55,203 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:55,203 INFO L82 PathProgramCache]: Analyzing trace with hash -717536728, now seen corresponding path program 421 times [2021-06-05 14:40:55,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:55,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556677774] [2021-06-05 14:40:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:55,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:55,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556677774] [2021-06-05 14:40:55,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556677774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:55,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971385446] [2021-06-05 14:40:55,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:55,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971385446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:55,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:55,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:40:55,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618569795] [2021-06-05 14:40:55,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:40:55,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:55,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:40:55,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:55,480 INFO L87 Difference]: Start difference. First operand 816 states and 2810 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:55,765 INFO L93 Difference]: Finished difference Result 1396 states and 4422 transitions. [2021-06-05 14:40:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:55,767 INFO L225 Difference]: With dead ends: 1396 [2021-06-05 14:40:55,767 INFO L226 Difference]: Without dead ends: 1396 [2021-06-05 14:40:55,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-06-05 14:40:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 819. [2021-06-05 14:40:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4535452322738385) internal successors, (2825), 818 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:55,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2825 transitions. [2021-06-05 14:40:55,777 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2825 transitions. Word has length 20 [2021-06-05 14:40:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:55,778 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2825 transitions. [2021-06-05 14:40:55,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2825 transitions. [2021-06-05 14:40:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:55,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:55,779 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:55,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4870,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:55,979 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:55,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:55,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1484382876, now seen corresponding path program 422 times [2021-06-05 14:40:55,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:55,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142983373] [2021-06-05 14:40:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:56,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:56,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142983373] [2021-06-05 14:40:56,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142983373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:56,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923421320] [2021-06-05 14:40:56,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:56,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:56,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:56,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:56,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:56,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923421320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:56,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:56,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:40:56,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476293426] [2021-06-05 14:40:56,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:40:56,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:40:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:56,321 INFO L87 Difference]: Start difference. First operand 819 states and 2825 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:56,696 INFO L93 Difference]: Finished difference Result 1428 states and 4503 transitions. [2021-06-05 14:40:56,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:56,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:56,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:56,698 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 14:40:56,698 INFO L226 Difference]: Without dead ends: 1428 [2021-06-05 14:40:56,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-05 14:40:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 820. [2021-06-05 14:40:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.456654456654457) internal successors, (2831), 819 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2831 transitions. [2021-06-05 14:40:56,709 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2831 transitions. Word has length 20 [2021-06-05 14:40:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:56,709 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2831 transitions. [2021-06-05 14:40:56,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2831 transitions. [2021-06-05 14:40:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:56,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:56,710 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:56,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4874,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:56,911 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:56,911 INFO L82 PathProgramCache]: Analyzing trace with hash 853447464, now seen corresponding path program 423 times [2021-06-05 14:40:56,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:56,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007593753] [2021-06-05 14:40:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:56,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:56,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007593753] [2021-06-05 14:40:56,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007593753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:56,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599178309] [2021-06-05 14:40:56,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:57,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:57,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:57,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:57,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:57,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599178309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:57,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:57,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:40:57,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100814363] [2021-06-05 14:40:57,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:40:57,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:57,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:40:57,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:57,235 INFO L87 Difference]: Start difference. First operand 820 states and 2831 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:57,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:57,542 INFO L93 Difference]: Finished difference Result 1395 states and 4426 transitions. [2021-06-05 14:40:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:57,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:57,544 INFO L225 Difference]: With dead ends: 1395 [2021-06-05 14:40:57,544 INFO L226 Difference]: Without dead ends: 1395 [2021-06-05 14:40:57,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-06-05 14:40:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 810. [2021-06-05 14:40:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4437577255871448) internal successors, (2786), 809 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2786 transitions. [2021-06-05 14:40:57,555 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2786 transitions. Word has length 20 [2021-06-05 14:40:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:57,555 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2786 transitions. [2021-06-05 14:40:57,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2786 transitions. [2021-06-05 14:40:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:57,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:57,556 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:57,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4881 [2021-06-05 14:40:57,756 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:57,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:57,757 INFO L82 PathProgramCache]: Analyzing trace with hash 43506906, now seen corresponding path program 424 times [2021-06-05 14:40:57,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:57,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433882260] [2021-06-05 14:40:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:57,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:57,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433882260] [2021-06-05 14:40:57,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433882260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:57,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237927660] [2021-06-05 14:40:57,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:57,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:57,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:57,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:57,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:58,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237927660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:58,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:58,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:40:58,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364775991] [2021-06-05 14:40:58,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:40:58,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:58,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:40:58,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:58,056 INFO L87 Difference]: Start difference. First operand 810 states and 2786 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:58,650 INFO L93 Difference]: Finished difference Result 1537 states and 4757 transitions. [2021-06-05 14:40:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:40:58,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:58,652 INFO L225 Difference]: With dead ends: 1537 [2021-06-05 14:40:58,652 INFO L226 Difference]: Without dead ends: 1537 [2021-06-05 14:40:58,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 511.4ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-06-05 14:40:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 814. [2021-06-05 14:40:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4477244772447726) internal successors, (2803), 813 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2803 transitions. [2021-06-05 14:40:58,663 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2803 transitions. Word has length 20 [2021-06-05 14:40:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:58,664 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2803 transitions. [2021-06-05 14:40:58,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2803 transitions. [2021-06-05 14:40:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:58,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:58,665 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:58,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:58,865 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:58,866 INFO L82 PathProgramCache]: Analyzing trace with hash -742547114, now seen corresponding path program 425 times [2021-06-05 14:40:58,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:58,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268100119] [2021-06-05 14:40:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:58,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:58,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268100119] [2021-06-05 14:40:58,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268100119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:58,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198952660] [2021-06-05 14:40:58,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:59,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:59,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:40:59,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:59,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198952660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:59,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:59,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:40:59,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401154318] [2021-06-05 14:40:59,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:40:59,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:59,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:40:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:59,269 INFO L87 Difference]: Start difference. First operand 814 states and 2803 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:59,821 INFO L93 Difference]: Finished difference Result 1337 states and 4202 transitions. [2021-06-05 14:40:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:59,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:40:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:59,823 INFO L225 Difference]: With dead ends: 1337 [2021-06-05 14:40:59,823 INFO L226 Difference]: Without dead ends: 1330 [2021-06-05 14:40:59,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 546.8ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:59,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-06-05 14:40:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 827. [2021-06-05 14:40:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.4418886198547214) internal successors, (2843), 826 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2843 transitions. [2021-06-05 14:40:59,834 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2843 transitions. Word has length 20 [2021-06-05 14:40:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:59,834 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2843 transitions. [2021-06-05 14:40:59,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:59,834 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2843 transitions. [2021-06-05 14:40:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:40:59,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:59,835 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:00,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4893 [2021-06-05 14:41:00,035 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:00,036 INFO L82 PathProgramCache]: Analyzing trace with hash 751865124, now seen corresponding path program 426 times [2021-06-05 14:41:00,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:00,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762334056] [2021-06-05 14:41:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:00,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:00,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762334056] [2021-06-05 14:41:00,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762334056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:00,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422839752] [2021-06-05 14:41:00,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:00,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:41:00,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:00,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:00,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422839752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:00,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:00,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:00,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295373541] [2021-06-05 14:41:00,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:00,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:00,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:00,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:00,321 INFO L87 Difference]: Start difference. First operand 827 states and 2843 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:01,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:01,170 INFO L93 Difference]: Finished difference Result 1650 states and 5058 transitions. [2021-06-05 14:41:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:41:01,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:01,172 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 14:41:01,172 INFO L226 Difference]: Without dead ends: 1650 [2021-06-05 14:41:01,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 745.7ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:41:01,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-06-05 14:41:01,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 830. [2021-06-05 14:41:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4463208685162847) internal successors, (2857), 829 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2857 transitions. [2021-06-05 14:41:01,184 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2857 transitions. Word has length 20 [2021-06-05 14:41:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:01,185 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2857 transitions. [2021-06-05 14:41:01,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2857 transitions. [2021-06-05 14:41:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:01,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:01,186 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:01,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4902 [2021-06-05 14:41:01,386 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:01,386 INFO L82 PathProgramCache]: Analyzing trace with hash -742042598, now seen corresponding path program 427 times [2021-06-05 14:41:01,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:01,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562592933] [2021-06-05 14:41:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:01,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:01,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562592933] [2021-06-05 14:41:01,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562592933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:01,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099626903] [2021-06-05 14:41:01,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:01,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:01,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:01,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099626903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:01,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:01,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:01,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979677816] [2021-06-05 14:41:01,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:01,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:01,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:01,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:01,662 INFO L87 Difference]: Start difference. First operand 830 states and 2857 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:02,023 INFO L93 Difference]: Finished difference Result 1375 states and 4358 transitions. [2021-06-05 14:41:02,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:02,023 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:02,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:02,025 INFO L225 Difference]: With dead ends: 1375 [2021-06-05 14:41:02,025 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 14:41:02,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:41:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 14:41:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 836. [2021-06-05 14:41:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.4335329341317364) internal successors, (2867), 835 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2867 transitions. [2021-06-05 14:41:02,035 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2867 transitions. Word has length 20 [2021-06-05 14:41:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:02,035 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2867 transitions. [2021-06-05 14:41:02,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2867 transitions. [2021-06-05 14:41:02,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:02,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:02,036 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:02,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4909 [2021-06-05 14:41:02,237 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:02,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2111981864, now seen corresponding path program 428 times [2021-06-05 14:41:02,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:02,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698196637] [2021-06-05 14:41:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:02,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:02,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698196637] [2021-06-05 14:41:02,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698196637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:02,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499997435] [2021-06-05 14:41:02,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:02,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:02,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:02,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:02,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499997435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:02,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:02,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:02,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523650265] [2021-06-05 14:41:02,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:02,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:02,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:02,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:02,650 INFO L87 Difference]: Start difference. First operand 836 states and 2867 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:02,957 INFO L93 Difference]: Finished difference Result 1262 states and 4041 transitions. [2021-06-05 14:41:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:02,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:02,959 INFO L225 Difference]: With dead ends: 1262 [2021-06-05 14:41:02,959 INFO L226 Difference]: Without dead ends: 1262 [2021-06-05 14:41:02,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-06-05 14:41:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 820. [2021-06-05 14:41:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.445665445665446) internal successors, (2822), 819 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-06-05 14:41:02,970 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-06-05 14:41:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:02,970 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-06-05 14:41:02,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-06-05 14:41:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:02,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:02,971 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:03,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4916 [2021-06-05 14:41:03,172 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:03,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:03,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1418132912, now seen corresponding path program 429 times [2021-06-05 14:41:03,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:03,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729462027] [2021-06-05 14:41:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:03,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:03,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729462027] [2021-06-05 14:41:03,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729462027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:03,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235709060] [2021-06-05 14:41:03,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:03,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:03,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:03,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:03,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235709060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:03,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:03,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:03,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24299860] [2021-06-05 14:41:03,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:03,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:03,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:03,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:03,484 INFO L87 Difference]: Start difference. First operand 820 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:03,830 INFO L93 Difference]: Finished difference Result 1233 states and 3969 transitions. [2021-06-05 14:41:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:03,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:03,831 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 14:41:03,831 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 14:41:03,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 348.5ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 14:41:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 820. [2021-06-05 14:41:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.445665445665446) internal successors, (2822), 819 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-06-05 14:41:03,841 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-06-05 14:41:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:03,841 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-06-05 14:41:03,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-06-05 14:41:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:03,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:03,842 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:04,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4925 [2021-06-05 14:41:04,043 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:04,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1862084004, now seen corresponding path program 430 times [2021-06-05 14:41:04,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:04,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227950461] [2021-06-05 14:41:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:04,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:04,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227950461] [2021-06-05 14:41:04,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227950461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:04,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247174296] [2021-06-05 14:41:04,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:04,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:04,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:04,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:04,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247174296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:04,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:04,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:04,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620449365] [2021-06-05 14:41:04,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:04,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:04,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:04,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:04,340 INFO L87 Difference]: Start difference. First operand 820 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:04,801 INFO L93 Difference]: Finished difference Result 1444 states and 4536 transitions. [2021-06-05 14:41:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:04,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:04,803 INFO L225 Difference]: With dead ends: 1444 [2021-06-05 14:41:04,803 INFO L226 Difference]: Without dead ends: 1444 [2021-06-05 14:41:04,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-06-05 14:41:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 810. [2021-06-05 14:41:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.452410383189122) internal successors, (2793), 809 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2793 transitions. [2021-06-05 14:41:04,814 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2793 transitions. Word has length 20 [2021-06-05 14:41:04,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:04,814 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2793 transitions. [2021-06-05 14:41:04,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2793 transitions. [2021-06-05 14:41:04,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:04,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:04,815 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:05,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4933,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:05,016 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:05,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1250117212, now seen corresponding path program 431 times [2021-06-05 14:41:05,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:05,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528417213] [2021-06-05 14:41:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:05,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:05,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528417213] [2021-06-05 14:41:05,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528417213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:05,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679509340] [2021-06-05 14:41:05,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:05,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:05,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:05,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679509340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:05,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:05,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:05,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231470876] [2021-06-05 14:41:05,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:05,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:05,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:05,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:05,345 INFO L87 Difference]: Start difference. First operand 810 states and 2793 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:05,892 INFO L93 Difference]: Finished difference Result 1475 states and 4621 transitions. [2021-06-05 14:41:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:41:05,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:05,894 INFO L225 Difference]: With dead ends: 1475 [2021-06-05 14:41:05,894 INFO L226 Difference]: Without dead ends: 1475 [2021-06-05 14:41:05,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:41:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-06-05 14:41:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 811. [2021-06-05 14:41:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.4555555555555557) internal successors, (2799), 810 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2799 transitions. [2021-06-05 14:41:05,914 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2799 transitions. Word has length 20 [2021-06-05 14:41:05,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:05,914 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2799 transitions. [2021-06-05 14:41:05,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2799 transitions. [2021-06-05 14:41:05,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:05,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:05,915 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:06,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4938,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:06,116 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:06,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1087713128, now seen corresponding path program 432 times [2021-06-05 14:41:06,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:06,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951545299] [2021-06-05 14:41:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:06,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:06,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951545299] [2021-06-05 14:41:06,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951545299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:06,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418250696] [2021-06-05 14:41:06,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:06,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:41:06,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:06,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:06,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:06,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418250696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:06,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:06,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:06,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474571478] [2021-06-05 14:41:06,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:06,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:06,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:06,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:06,525 INFO L87 Difference]: Start difference. First operand 811 states and 2799 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:06,918 INFO L93 Difference]: Finished difference Result 1432 states and 4518 transitions. [2021-06-05 14:41:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:06,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:06,920 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 14:41:06,920 INFO L226 Difference]: Without dead ends: 1432 [2021-06-05 14:41:06,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 447.1ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-05 14:41:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 807. [2021-06-05 14:41:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.446650124069479) internal successors, (2778), 806 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2778 transitions. [2021-06-05 14:41:06,932 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2778 transitions. Word has length 20 [2021-06-05 14:41:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:06,932 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2778 transitions. [2021-06-05 14:41:06,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2778 transitions. [2021-06-05 14:41:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:06,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:06,934 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:07,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4945 [2021-06-05 14:41:07,134 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:07,134 INFO L82 PathProgramCache]: Analyzing trace with hash 688471976, now seen corresponding path program 433 times [2021-06-05 14:41:07,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:07,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581839222] [2021-06-05 14:41:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:07,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:07,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581839222] [2021-06-05 14:41:07,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581839222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:07,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220839988] [2021-06-05 14:41:07,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:07,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:07,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:07,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220839988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:07,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:07,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:07,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504401481] [2021-06-05 14:41:07,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:07,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:07,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:07,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:07,458 INFO L87 Difference]: Start difference. First operand 807 states and 2778 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:08,003 INFO L93 Difference]: Finished difference Result 1355 states and 4261 transitions. [2021-06-05 14:41:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:08,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:08,005 INFO L225 Difference]: With dead ends: 1355 [2021-06-05 14:41:08,005 INFO L226 Difference]: Without dead ends: 1348 [2021-06-05 14:41:08,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-06-05 14:41:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 822. [2021-06-05 14:41:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.4470158343483557) internal successors, (2830), 821 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2830 transitions. [2021-06-05 14:41:08,016 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2830 transitions. Word has length 20 [2021-06-05 14:41:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:08,016 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2830 transitions. [2021-06-05 14:41:08,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2830 transitions. [2021-06-05 14:41:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:08,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:08,017 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:08,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4952,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:08,217 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2112083082, now seen corresponding path program 434 times [2021-06-05 14:41:08,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:08,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824771277] [2021-06-05 14:41:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:08,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824771277] [2021-06-05 14:41:08,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824771277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503688230] [2021-06-05 14:41:08,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:08,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:08,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:08,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:08,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503688230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:08,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:08,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:08,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343390698] [2021-06-05 14:41:08,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:08,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:08,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:08,501 INFO L87 Difference]: Start difference. First operand 822 states and 2830 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:09,609 INFO L93 Difference]: Finished difference Result 1686 states and 5138 transitions. [2021-06-05 14:41:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:41:09,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:09,611 INFO L225 Difference]: With dead ends: 1686 [2021-06-05 14:41:09,611 INFO L226 Difference]: Without dead ends: 1686 [2021-06-05 14:41:09,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1019.3ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:41:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-06-05 14:41:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 826. [2021-06-05 14:41:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.4545454545454546) internal successors, (2850), 825 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2850 transitions. [2021-06-05 14:41:09,631 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2850 transitions. Word has length 20 [2021-06-05 14:41:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:09,631 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2850 transitions. [2021-06-05 14:41:09,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:09,631 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2850 transitions. [2021-06-05 14:41:09,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:09,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:09,632 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:09,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4961,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:09,832 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash 688976492, now seen corresponding path program 435 times [2021-06-05 14:41:09,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:09,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986095166] [2021-06-05 14:41:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:09,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:09,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986095166] [2021-06-05 14:41:09,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986095166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:09,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756742806] [2021-06-05 14:41:09,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:10,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:41:10,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:10,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:10,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:10,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756742806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:10,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:10,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:10,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433438380] [2021-06-05 14:41:10,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:10,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:10,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:10,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:10,111 INFO L87 Difference]: Start difference. First operand 826 states and 2850 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:10,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:10,563 INFO L93 Difference]: Finished difference Result 1394 states and 4411 transitions. [2021-06-05 14:41:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:41:10,563 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:10,565 INFO L225 Difference]: With dead ends: 1394 [2021-06-05 14:41:10,565 INFO L226 Difference]: Without dead ends: 1388 [2021-06-05 14:41:10,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:41:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-05 14:41:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 832. [2021-06-05 14:41:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.441636582430806) internal successors, (2860), 831 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2860 transitions. [2021-06-05 14:41:10,575 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2860 transitions. Word has length 20 [2021-06-05 14:41:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:10,575 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2860 transitions. [2021-06-05 14:41:10,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2860 transitions. [2021-06-05 14:41:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:10,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:10,576 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:10,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4969 [2021-06-05 14:41:10,777 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:10,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:10,777 INFO L82 PathProgramCache]: Analyzing trace with hash -751966342, now seen corresponding path program 436 times [2021-06-05 14:41:10,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:10,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239179099] [2021-06-05 14:41:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:10,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:10,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239179099] [2021-06-05 14:41:10,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239179099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:10,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58211441] [2021-06-05 14:41:10,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:10,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:10,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:10,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:10,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:11,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58211441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:11,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:11,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:11,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492662346] [2021-06-05 14:41:11,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:11,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:11,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:11,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:11,119 INFO L87 Difference]: Start difference. First operand 832 states and 2860 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:11,695 INFO L93 Difference]: Finished difference Result 1356 states and 4269 transitions. [2021-06-05 14:41:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:11,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:11,697 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 14:41:11,697 INFO L226 Difference]: Without dead ends: 1356 [2021-06-05 14:41:11,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 546.0ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-06-05 14:41:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 829. [2021-06-05 14:41:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4444444444444446) internal successors, (2852), 828 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2852 transitions. [2021-06-05 14:41:11,708 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2852 transitions. Word has length 20 [2021-06-05 14:41:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:11,708 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2852 transitions. [2021-06-05 14:41:11,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2852 transitions. [2021-06-05 14:41:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:11,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:11,709 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:11,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4977,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:11,910 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:11,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:11,910 INFO L82 PathProgramCache]: Analyzing trace with hash -496664768, now seen corresponding path program 437 times [2021-06-05 14:41:11,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:11,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495059425] [2021-06-05 14:41:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:11,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:11,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495059425] [2021-06-05 14:41:11,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495059425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:11,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806242636] [2021-06-05 14:41:11,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:12,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:12,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:12,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:12,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:12,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806242636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:12,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:12,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:12,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268076719] [2021-06-05 14:41:12,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:12,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:12,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:12,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:12,249 INFO L87 Difference]: Start difference. First operand 829 states and 2852 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:12,777 INFO L93 Difference]: Finished difference Result 1314 states and 4162 transitions. [2021-06-05 14:41:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:12,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:12,779 INFO L225 Difference]: With dead ends: 1314 [2021-06-05 14:41:12,779 INFO L226 Difference]: Without dead ends: 1307 [2021-06-05 14:41:12,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 560.8ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-05 14:41:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 833. [2021-06-05 14:41:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4447115384615383) internal successors, (2866), 832 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2866 transitions. [2021-06-05 14:41:12,791 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2866 transitions. Word has length 20 [2021-06-05 14:41:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:12,791 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2866 transitions. [2021-06-05 14:41:12,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2866 transitions. [2021-06-05 14:41:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:12,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:12,792 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:12,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4993,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:12,992 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:12,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1871238056, now seen corresponding path program 438 times [2021-06-05 14:41:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:12,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799898961] [2021-06-05 14:41:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:13,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:13,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799898961] [2021-06-05 14:41:13,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799898961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:13,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38278089] [2021-06-05 14:41:13,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:13,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:41:13,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:13,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:13,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38278089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:13,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:13,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:13,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867451565] [2021-06-05 14:41:13,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:13,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:13,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:13,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:13,313 INFO L87 Difference]: Start difference. First operand 833 states and 2866 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:13,778 INFO L93 Difference]: Finished difference Result 1248 states and 4030 transitions. [2021-06-05 14:41:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:13,779 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 14:41:13,780 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 14:41:13,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 500.0ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:41:13,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 14:41:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 831. [2021-06-05 14:41:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.446987951807229) internal successors, (2861), 830 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2861 transitions. [2021-06-05 14:41:13,790 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2861 transitions. Word has length 20 [2021-06-05 14:41:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:13,790 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2861 transitions. [2021-06-05 14:41:13,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2861 transitions. [2021-06-05 14:41:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:13,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:13,791 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:13,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5003,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:13,991 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1360682644, now seen corresponding path program 439 times [2021-06-05 14:41:13,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:13,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346682676] [2021-06-05 14:41:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:14,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:14,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346682676] [2021-06-05 14:41:14,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346682676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:14,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839624977] [2021-06-05 14:41:14,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:14,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:14,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839624977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:14,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:14,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:14,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295623965] [2021-06-05 14:41:14,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:14,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:14,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:14,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:14,273 INFO L87 Difference]: Start difference. First operand 831 states and 2861 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:15,198 INFO L93 Difference]: Finished difference Result 1564 states and 4857 transitions. [2021-06-05 14:41:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:41:15,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:15,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:15,200 INFO L225 Difference]: With dead ends: 1564 [2021-06-05 14:41:15,200 INFO L226 Difference]: Without dead ends: 1564 [2021-06-05 14:41:15,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 788.6ms TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:41:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-06-05 14:41:15,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 822. [2021-06-05 14:41:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.451887941534714) internal successors, (2834), 821 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2834 transitions. [2021-06-05 14:41:15,211 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2834 transitions. Word has length 20 [2021-06-05 14:41:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:15,211 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2834 transitions. [2021-06-05 14:41:15,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2834 transitions. [2021-06-05 14:41:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:15,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:15,212 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:15,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5010 [2021-06-05 14:41:15,413 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:15,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:15,413 INFO L82 PathProgramCache]: Analyzing trace with hash -68340244, now seen corresponding path program 440 times [2021-06-05 14:41:15,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:15,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204607618] [2021-06-05 14:41:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:15,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:15,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204607618] [2021-06-05 14:41:15,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204607618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:15,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915916994] [2021-06-05 14:41:15,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:15,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:15,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:15,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:15,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:15,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915916994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:15,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:15,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:15,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760443986] [2021-06-05 14:41:15,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:15,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:15,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:15,701 INFO L87 Difference]: Start difference. First operand 822 states and 2834 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:16,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:16,545 INFO L93 Difference]: Finished difference Result 1533 states and 4790 transitions. [2021-06-05 14:41:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:41:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:16,547 INFO L225 Difference]: With dead ends: 1533 [2021-06-05 14:41:16,547 INFO L226 Difference]: Without dead ends: 1533 [2021-06-05 14:41:16,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 731.6ms TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:41:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-06-05 14:41:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 821. [2021-06-05 14:41:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.448780487804878) internal successors, (2828), 820 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2828 transitions. [2021-06-05 14:41:16,565 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2828 transitions. Word has length 20 [2021-06-05 14:41:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:16,565 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2828 transitions. [2021-06-05 14:41:16,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2828 transitions. [2021-06-05 14:41:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:16,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:16,566 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:16,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5018,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:16,767 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:16,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1339946116, now seen corresponding path program 441 times [2021-06-05 14:41:16,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:16,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8981153] [2021-06-05 14:41:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:16,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:16,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8981153] [2021-06-05 14:41:16,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8981153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:16,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463278064] [2021-06-05 14:41:16,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:16,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:41:16,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:16,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:16,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:17,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463278064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:17,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:17,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:17,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784165814] [2021-06-05 14:41:17,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:17,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:17,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:17,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:17,070 INFO L87 Difference]: Start difference. First operand 821 states and 2828 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:17,433 INFO L93 Difference]: Finished difference Result 1278 states and 4121 transitions. [2021-06-05 14:41:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:17,435 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 14:41:17,435 INFO L226 Difference]: Without dead ends: 1272 [2021-06-05 14:41:17,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-05 14:41:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 831. [2021-06-05 14:41:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.4397590361445785) internal successors, (2855), 830 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2855 transitions. [2021-06-05 14:41:17,445 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2855 transitions. Word has length 20 [2021-06-05 14:41:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:17,445 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2855 transitions. [2021-06-05 14:41:17,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2855 transitions. [2021-06-05 14:41:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:17,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:17,446 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:17,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5026,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:17,647 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1039597254, now seen corresponding path program 442 times [2021-06-05 14:41:17,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:17,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599503464] [2021-06-05 14:41:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:17,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:17,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599503464] [2021-06-05 14:41:17,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599503464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:17,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638862557] [2021-06-05 14:41:17,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:17,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:17,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:17,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638862557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:17,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:17,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:17,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174567879] [2021-06-05 14:41:17,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:17,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:17,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:17,935 INFO L87 Difference]: Start difference. First operand 831 states and 2855 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:18,275 INFO L93 Difference]: Finished difference Result 1369 states and 4359 transitions. [2021-06-05 14:41:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:18,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:18,277 INFO L225 Difference]: With dead ends: 1369 [2021-06-05 14:41:18,277 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 14:41:18,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 14:41:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 821. [2021-06-05 14:41:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.448780487804878) internal successors, (2828), 820 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2828 transitions. [2021-06-05 14:41:18,287 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2828 transitions. Word has length 20 [2021-06-05 14:41:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:18,287 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2828 transitions. [2021-06-05 14:41:18,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2828 transitions. [2021-06-05 14:41:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:18,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:18,288 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:18,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5034 [2021-06-05 14:41:18,489 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:18,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:18,489 INFO L82 PathProgramCache]: Analyzing trace with hash -844351768, now seen corresponding path program 443 times [2021-06-05 14:41:18,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:18,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774083140] [2021-06-05 14:41:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:18,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:18,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774083140] [2021-06-05 14:41:18,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774083140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:18,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690419624] [2021-06-05 14:41:18,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:18,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:41:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:18,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:18,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:18,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690419624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:18,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:18,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:18,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695693757] [2021-06-05 14:41:18,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:18,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:18,824 INFO L87 Difference]: Start difference. First operand 821 states and 2828 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:19,188 INFO L93 Difference]: Finished difference Result 1227 states and 3962 transitions. [2021-06-05 14:41:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:41:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:19,189 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 14:41:19,189 INFO L226 Difference]: Without dead ends: 1227 [2021-06-05 14:41:19,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-05 14:41:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 820. [2021-06-05 14:41:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.446886446886447) internal successors, (2823), 819 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2823 transitions. [2021-06-05 14:41:19,199 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2823 transitions. Word has length 20 [2021-06-05 14:41:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:19,199 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2823 transitions. [2021-06-05 14:41:19,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2823 transitions. [2021-06-05 14:41:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:19,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:19,200 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:19,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5041,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:19,401 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:19,401 INFO L82 PathProgramCache]: Analyzing trace with hash 779986000, now seen corresponding path program 444 times [2021-06-05 14:41:19,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:19,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032338187] [2021-06-05 14:41:19,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:19,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:19,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032338187] [2021-06-05 14:41:19,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032338187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:19,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181417299] [2021-06-05 14:41:19,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:19,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:19,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:19,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181417299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:19,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:19,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:19,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282156251] [2021-06-05 14:41:19,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:19,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:19,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:19,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:19,720 INFO L87 Difference]: Start difference. First operand 820 states and 2823 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:20,021 INFO L93 Difference]: Finished difference Result 1191 states and 3882 transitions. [2021-06-05 14:41:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:41:20,021 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:20,023 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 14:41:20,023 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 14:41:20,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 14:41:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 804. [2021-06-05 14:41:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.439601494396015) internal successors, (2762), 803 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2762 transitions. [2021-06-05 14:41:20,032 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2762 transitions. Word has length 20 [2021-06-05 14:41:20,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:20,033 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2762 transitions. [2021-06-05 14:41:20,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2762 transitions. [2021-06-05 14:41:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:20,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:20,034 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:20,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5052,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:20,234 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:20,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:20,234 INFO L82 PathProgramCache]: Analyzing trace with hash -766554712, now seen corresponding path program 445 times [2021-06-05 14:41:20,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:20,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477532215] [2021-06-05 14:41:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:20,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:20,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477532215] [2021-06-05 14:41:20,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477532215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:20,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694877865] [2021-06-05 14:41:20,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:20,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:20,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694877865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:20,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:20,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:41:20,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360236143] [2021-06-05 14:41:20,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:41:20,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:20,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:41:20,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:41:20,494 INFO L87 Difference]: Start difference. First operand 804 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:20,824 INFO L93 Difference]: Finished difference Result 1123 states and 3609 transitions. [2021-06-05 14:41:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:20,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:20,826 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 14:41:20,826 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 14:41:20,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 14:41:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 807. [2021-06-05 14:41:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.436724565756824) internal successors, (2770), 806 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2770 transitions. [2021-06-05 14:41:20,839 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2770 transitions. Word has length 20 [2021-06-05 14:41:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:20,839 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2770 transitions. [2021-06-05 14:41:20,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2770 transitions. [2021-06-05 14:41:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:20,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:20,841 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:21,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5059,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:21,057 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash -58196494, now seen corresponding path program 446 times [2021-06-05 14:41:21,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:21,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117759636] [2021-06-05 14:41:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:21,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:21,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117759636] [2021-06-05 14:41:21,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117759636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:21,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399251082] [2021-06-05 14:41:21,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:21,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:21,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:21,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:21,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:21,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399251082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:21,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:21,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:41:21,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825199491] [2021-06-05 14:41:21,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:41:21,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:21,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:41:21,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:41:21,329 INFO L87 Difference]: Start difference. First operand 807 states and 2770 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:21,928 INFO L93 Difference]: Finished difference Result 1242 states and 3910 transitions. [2021-06-05 14:41:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:41:21,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:21,930 INFO L225 Difference]: With dead ends: 1242 [2021-06-05 14:41:21,930 INFO L226 Difference]: Without dead ends: 1242 [2021-06-05 14:41:21,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:41:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-05 14:41:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 810. [2021-06-05 14:41:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4375772558714464) internal successors, (2781), 809 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2781 transitions. [2021-06-05 14:41:21,940 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2781 transitions. Word has length 20 [2021-06-05 14:41:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:21,940 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2781 transitions. [2021-06-05 14:41:21,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2781 transitions. [2021-06-05 14:41:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:21,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:21,941 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:22,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5061,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:22,141 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:22,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1552104216, now seen corresponding path program 447 times [2021-06-05 14:41:22,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:22,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801607762] [2021-06-05 14:41:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:22,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:22,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801607762] [2021-06-05 14:41:22,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801607762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:22,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743831767] [2021-06-05 14:41:22,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:22,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:41:22,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:22,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:22,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743831767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:22,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:22,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:41:22,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008335887] [2021-06-05 14:41:22,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:41:22,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:22,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:41:22,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:41:22,395 INFO L87 Difference]: Start difference. First operand 810 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:22,751 INFO L93 Difference]: Finished difference Result 1126 states and 3612 transitions. [2021-06-05 14:41:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:22,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:22,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:22,752 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 14:41:22,752 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 14:41:22,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 14:41:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 804. [2021-06-05 14:41:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.439601494396015) internal successors, (2762), 803 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2762 transitions. [2021-06-05 14:41:22,761 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2762 transitions. Word has length 20 [2021-06-05 14:41:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:22,762 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2762 transitions. [2021-06-05 14:41:22,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2762 transitions. [2021-06-05 14:41:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:22,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:22,763 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:22,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5066 [2021-06-05 14:41:22,963 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash 635574444, now seen corresponding path program 448 times [2021-06-05 14:41:22,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:22,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447596197] [2021-06-05 14:41:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:23,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:23,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447596197] [2021-06-05 14:41:23,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447596197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:23,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356750792] [2021-06-05 14:41:23,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:23,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:23,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:23,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:23,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:23,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356750792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:23,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:23,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:41:23,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119730434] [2021-06-05 14:41:23,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:41:23,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:41:23,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:41:23,219 INFO L87 Difference]: Start difference. First operand 804 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:23,508 INFO L93 Difference]: Finished difference Result 1162 states and 3704 transitions. [2021-06-05 14:41:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:23,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:23,510 INFO L225 Difference]: With dead ends: 1162 [2021-06-05 14:41:23,510 INFO L226 Difference]: Without dead ends: 1155 [2021-06-05 14:41:23,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:23,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-05 14:41:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 823. [2021-06-05 14:41:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.435523114355231) internal successors, (2824), 822 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2824 transitions. [2021-06-05 14:41:23,520 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2824 transitions. Word has length 20 [2021-06-05 14:41:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:23,520 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2824 transitions. [2021-06-05 14:41:23,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2824 transitions. [2021-06-05 14:41:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:23,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:23,521 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:23,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5072,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:23,722 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:23,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2129986682, now seen corresponding path program 449 times [2021-06-05 14:41:23,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:23,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071913476] [2021-06-05 14:41:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:23,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:23,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071913476] [2021-06-05 14:41:23,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071913476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:23,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285560667] [2021-06-05 14:41:23,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:23,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:41:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:24,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285560667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:24,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:24,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:41:24,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607213998] [2021-06-05 14:41:24,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:41:24,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:24,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:41:24,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:41:24,006 INFO L87 Difference]: Start difference. First operand 823 states and 2824 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:24,402 INFO L93 Difference]: Finished difference Result 1164 states and 3708 transitions. [2021-06-05 14:41:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:24,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:24,404 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 14:41:24,404 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 14:41:24,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:41:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 14:41:24,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 823. [2021-06-05 14:41:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.435523114355231) internal successors, (2824), 822 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2824 transitions. [2021-06-05 14:41:24,413 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2824 transitions. Word has length 20 [2021-06-05 14:41:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:24,413 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2824 transitions. [2021-06-05 14:41:24,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2824 transitions. [2021-06-05 14:41:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:24,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:24,415 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:24,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5078 [2021-06-05 14:41:24,615 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:24,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:24,615 INFO L82 PathProgramCache]: Analyzing trace with hash 636078960, now seen corresponding path program 450 times [2021-06-05 14:41:24,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:24,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605118826] [2021-06-05 14:41:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:24,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:24,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605118826] [2021-06-05 14:41:24,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605118826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:24,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58030196] [2021-06-05 14:41:24,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:24,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:41:24,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:24,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58030196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:24,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:24,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:41:24,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808339548] [2021-06-05 14:41:24,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:41:24,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:24,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:41:24,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:41:24,880 INFO L87 Difference]: Start difference. First operand 823 states and 2824 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:25,300 INFO L93 Difference]: Finished difference Result 1143 states and 3648 transitions. [2021-06-05 14:41:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:25,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:25,302 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 14:41:25,302 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 14:41:25,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:41:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 14:41:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 823. [2021-06-05 14:41:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.431873479318735) internal successors, (2821), 822 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2821 transitions. [2021-06-05 14:41:25,312 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2821 transitions. Word has length 20 [2021-06-05 14:41:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:25,312 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2821 transitions. [2021-06-05 14:41:25,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2821 transitions. [2021-06-05 14:41:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:25,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:25,313 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:25,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5085,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:25,513 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash -804863874, now seen corresponding path program 451 times [2021-06-05 14:41:25,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:25,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835478594] [2021-06-05 14:41:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:25,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:25,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835478594] [2021-06-05 14:41:25,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835478594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:25,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536320309] [2021-06-05 14:41:25,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:25,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:25,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:25,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536320309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:25,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:25,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:41:25,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240381839] [2021-06-05 14:41:25,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:41:25,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:41:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:41:25,767 INFO L87 Difference]: Start difference. First operand 823 states and 2821 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:26,069 INFO L93 Difference]: Finished difference Result 1111 states and 3584 transitions. [2021-06-05 14:41:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:26,070 INFO L225 Difference]: With dead ends: 1111 [2021-06-05 14:41:26,071 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 14:41:26,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 14:41:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 820. [2021-06-05 14:41:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.4346764346764345) internal successors, (2813), 819 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2813 transitions. [2021-06-05 14:41:26,080 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2813 transitions. Word has length 20 [2021-06-05 14:41:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:26,080 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2813 transitions. [2021-06-05 14:41:26,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2813 transitions. [2021-06-05 14:41:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:26,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:26,082 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:26,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5091 [2021-06-05 14:41:26,300 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:26,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1173934538, now seen corresponding path program 452 times [2021-06-05 14:41:26,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:26,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010167645] [2021-06-05 14:41:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:26,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:26,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010167645] [2021-06-05 14:41:26,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010167645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:26,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204589122] [2021-06-05 14:41:26,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:26,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:26,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:26,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:26,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:26,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204589122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:26,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:26,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:41:26,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103183061] [2021-06-05 14:41:26,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:41:26,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:26,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:41:26,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:41:26,578 INFO L87 Difference]: Start difference. First operand 820 states and 2813 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:26,950 INFO L93 Difference]: Finished difference Result 1034 states and 3392 transitions. [2021-06-05 14:41:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:26,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:26,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:26,952 INFO L225 Difference]: With dead ends: 1034 [2021-06-05 14:41:26,952 INFO L226 Difference]: Without dead ends: 1022 [2021-06-05 14:41:26,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:41:26,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-06-05 14:41:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 820. [2021-06-05 14:41:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.431013431013431) internal successors, (2810), 819 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2810 transitions. [2021-06-05 14:41:26,961 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2810 transitions. Word has length 20 [2021-06-05 14:41:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:26,961 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2810 transitions. [2021-06-05 14:41:26,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2810 transitions. [2021-06-05 14:41:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:26,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:26,962 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:27,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5095,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:27,163 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:27,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1343932662, now seen corresponding path program 453 times [2021-06-05 14:41:27,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:27,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447443089] [2021-06-05 14:41:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:27,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:27,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447443089] [2021-06-05 14:41:27,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447443089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:27,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351081727] [2021-06-05 14:41:27,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:27,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:41:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:27,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:27,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351081727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:27,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:27,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:41:27,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993087654] [2021-06-05 14:41:27,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:41:27,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:27,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:41:27,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:41:27,406 INFO L87 Difference]: Start difference. First operand 820 states and 2810 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:27,724 INFO L93 Difference]: Finished difference Result 1048 states and 3431 transitions. [2021-06-05 14:41:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:27,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:27,725 INFO L225 Difference]: With dead ends: 1048 [2021-06-05 14:41:27,725 INFO L226 Difference]: Without dead ends: 1048 [2021-06-05 14:41:27,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 291.1ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-05 14:41:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 801. [2021-06-05 14:41:27,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.4425) internal successors, (2754), 800 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:27,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2754 transitions. [2021-06-05 14:41:27,734 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2754 transitions. Word has length 20 [2021-06-05 14:41:27,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:27,734 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2754 transitions. [2021-06-05 14:41:27,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2754 transitions. [2021-06-05 14:41:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:27,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:27,735 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:27,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5102 [2021-06-05 14:41:27,936 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:27,936 INFO L82 PathProgramCache]: Analyzing trace with hash -225239522, now seen corresponding path program 454 times [2021-06-05 14:41:27,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:27,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602884812] [2021-06-05 14:41:27,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:27,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:27,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602884812] [2021-06-05 14:41:27,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602884812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:27,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164457048] [2021-06-05 14:41:27,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:28,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:28,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:28,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164457048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:28,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:28,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:28,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481509229] [2021-06-05 14:41:28,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:28,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:28,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:28,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:28,230 INFO L87 Difference]: Start difference. First operand 801 states and 2754 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:28,657 INFO L93 Difference]: Finished difference Result 1254 states and 3940 transitions. [2021-06-05 14:41:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:28,659 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 14:41:28,659 INFO L226 Difference]: Without dead ends: 1254 [2021-06-05 14:41:28,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-06-05 14:41:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 808. [2021-06-05 14:41:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.44361833952912) internal successors, (2779), 807 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2779 transitions. [2021-06-05 14:41:28,669 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2779 transitions. Word has length 20 [2021-06-05 14:41:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:28,669 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2779 transitions. [2021-06-05 14:41:28,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2779 transitions. [2021-06-05 14:41:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:28,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:28,670 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:28,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5104,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:28,871 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:28,871 INFO L82 PathProgramCache]: Analyzing trace with hash 483118696, now seen corresponding path program 455 times [2021-06-05 14:41:28,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:28,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159129737] [2021-06-05 14:41:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:28,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:28,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159129737] [2021-06-05 14:41:28,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159129737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:28,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407489889] [2021-06-05 14:41:28,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:29,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:29,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:29,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:29,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:29,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407489889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:29,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:29,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:29,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827029440] [2021-06-05 14:41:29,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:29,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:29,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:29,162 INFO L87 Difference]: Start difference. First operand 808 states and 2779 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:29,876 INFO L93 Difference]: Finished difference Result 1428 states and 4361 transitions. [2021-06-05 14:41:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:41:29,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:29,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:29,878 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 14:41:29,878 INFO L226 Difference]: Without dead ends: 1428 [2021-06-05 14:41:29,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 627.9ms TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:41:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-05 14:41:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 814. [2021-06-05 14:41:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4489544895448954) internal successors, (2804), 813 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2804 transitions. [2021-06-05 14:41:29,889 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2804 transitions. Word has length 20 [2021-06-05 14:41:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:29,889 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2804 transitions. [2021-06-05 14:41:29,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2804 transitions. [2021-06-05 14:41:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:29,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:29,890 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:30,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5109,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:30,091 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:30,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1010789026, now seen corresponding path program 456 times [2021-06-05 14:41:30,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:30,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470629455] [2021-06-05 14:41:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:30,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:30,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470629455] [2021-06-05 14:41:30,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470629455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:30,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440537170] [2021-06-05 14:41:30,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:30,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:30,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:30,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:30,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440537170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:30,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:30,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:30,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209186461] [2021-06-05 14:41:30,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:30,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:30,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:30,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:30,395 INFO L87 Difference]: Start difference. First operand 814 states and 2804 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:30,785 INFO L93 Difference]: Finished difference Result 1190 states and 3778 transitions. [2021-06-05 14:41:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:30,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:30,787 INFO L225 Difference]: With dead ends: 1190 [2021-06-05 14:41:30,787 INFO L226 Difference]: Without dead ends: 1184 [2021-06-05 14:41:30,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:41:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-06-05 14:41:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 814. [2021-06-05 14:41:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4415744157441575) internal successors, (2798), 813 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2798 transitions. [2021-06-05 14:41:30,797 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2798 transitions. Word has length 20 [2021-06-05 14:41:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:30,797 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2798 transitions. [2021-06-05 14:41:30,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2798 transitions. [2021-06-05 14:41:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:30,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:30,798 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:30,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5117,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:30,998 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:30,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1686879340, now seen corresponding path program 457 times [2021-06-05 14:41:30,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:30,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646879570] [2021-06-05 14:41:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:31,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:31,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646879570] [2021-06-05 14:41:31,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646879570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:31,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341426053] [2021-06-05 14:41:31,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:31,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341426053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:31,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:31,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:31,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204465925] [2021-06-05 14:41:31,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:31,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:31,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:31,305 INFO L87 Difference]: Start difference. First operand 814 states and 2798 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:31,723 INFO L93 Difference]: Finished difference Result 1100 states and 3553 transitions. [2021-06-05 14:41:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:31,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:31,725 INFO L225 Difference]: With dead ends: 1100 [2021-06-05 14:41:31,725 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 14:41:31,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 14:41:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 814. [2021-06-05 14:41:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4415744157441575) internal successors, (2798), 813 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2798 transitions. [2021-06-05 14:41:31,734 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2798 transitions. Word has length 20 [2021-06-05 14:41:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:31,734 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2798 transitions. [2021-06-05 14:41:31,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2798 transitions. [2021-06-05 14:41:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:31,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:31,735 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:31,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5127,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:31,936 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:31,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1593337576, now seen corresponding path program 458 times [2021-06-05 14:41:31,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:31,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568217986] [2021-06-05 14:41:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:31,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:31,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568217986] [2021-06-05 14:41:31,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568217986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:31,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080944785] [2021-06-05 14:41:31,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:32,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:32,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:32,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:32,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080944785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:32,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:32,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:32,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245033769] [2021-06-05 14:41:32,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:32,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:32,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:32,237 INFO L87 Difference]: Start difference. First operand 814 states and 2798 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:32,634 INFO L93 Difference]: Finished difference Result 1196 states and 3803 transitions. [2021-06-05 14:41:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:32,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:32,636 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 14:41:32,636 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 14:41:32,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 14:41:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 804. [2021-06-05 14:41:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.448318804483188) internal successors, (2769), 803 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2769 transitions. [2021-06-05 14:41:32,645 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2769 transitions. Word has length 20 [2021-06-05 14:41:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:32,645 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2769 transitions. [2021-06-05 14:41:32,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2769 transitions. [2021-06-05 14:41:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:32,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:32,646 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:32,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5135 [2021-06-05 14:41:32,847 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:32,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1518863640, now seen corresponding path program 459 times [2021-06-05 14:41:32,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:32,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575707290] [2021-06-05 14:41:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:32,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:32,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575707290] [2021-06-05 14:41:32,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575707290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:32,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809264692] [2021-06-05 14:41:32,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:33,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:33,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:33,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:33,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:33,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809264692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:33,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:33,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:33,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589758753] [2021-06-05 14:41:33,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:33,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:33,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:33,131 INFO L87 Difference]: Start difference. First operand 804 states and 2769 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:33,554 INFO L93 Difference]: Finished difference Result 1208 states and 3832 transitions. [2021-06-05 14:41:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:33,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:33,556 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 14:41:33,556 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 14:41:33,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 14:41:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 805. [2021-06-05 14:41:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.451492537313433) internal successors, (2775), 804 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2775 transitions. [2021-06-05 14:41:33,566 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2775 transitions. Word has length 20 [2021-06-05 14:41:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:33,566 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2775 transitions. [2021-06-05 14:41:33,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2775 transitions. [2021-06-05 14:41:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:33,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:33,567 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:33,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5140 [2021-06-05 14:41:33,768 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:33,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:33,768 INFO L82 PathProgramCache]: Analyzing trace with hash 818966700, now seen corresponding path program 460 times [2021-06-05 14:41:33,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:33,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522584894] [2021-06-05 14:41:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:33,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:33,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522584894] [2021-06-05 14:41:33,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522584894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:33,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583354909] [2021-06-05 14:41:33,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:33,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:33,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:33,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:33,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:34,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583354909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:34,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:34,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:34,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330072519] [2021-06-05 14:41:34,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:34,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:34,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:34,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:34,068 INFO L87 Difference]: Start difference. First operand 805 states and 2775 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:34,376 INFO L93 Difference]: Finished difference Result 1175 states and 3755 transitions. [2021-06-05 14:41:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:34,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:34,378 INFO L225 Difference]: With dead ends: 1175 [2021-06-05 14:41:34,378 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 14:41:34,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 14:41:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 801. [2021-06-05 14:41:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.4425) internal successors, (2754), 800 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2754 transitions. [2021-06-05 14:41:34,387 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2754 transitions. Word has length 20 [2021-06-05 14:41:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:34,388 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2754 transitions. [2021-06-05 14:41:34,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2754 transitions. [2021-06-05 14:41:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:34,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:34,389 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:34,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5147,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:34,589 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1914137786, now seen corresponding path program 461 times [2021-06-05 14:41:34,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:34,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293120289] [2021-06-05 14:41:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:34,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:34,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293120289] [2021-06-05 14:41:34,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293120289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:34,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245154349] [2021-06-05 14:41:34,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:34,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:34,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:34,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:34,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:34,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245154349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:34,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:34,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:34,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328139001] [2021-06-05 14:41:34,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:34,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:34,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:34,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:34,902 INFO L87 Difference]: Start difference. First operand 801 states and 2754 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:35,723 INFO L93 Difference]: Finished difference Result 1432 states and 4400 transitions. [2021-06-05 14:41:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:41:35,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:35,725 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 14:41:35,725 INFO L226 Difference]: Without dead ends: 1432 [2021-06-05 14:41:35,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 763.1ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:41:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-05 14:41:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 806. [2021-06-05 14:41:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.453416149068323) internal successors, (2780), 805 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2780 transitions. [2021-06-05 14:41:35,736 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2780 transitions. Word has length 20 [2021-06-05 14:41:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:35,736 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2780 transitions. [2021-06-05 14:41:35,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2780 transitions. [2021-06-05 14:41:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:35,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:35,737 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:35,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5154 [2021-06-05 14:41:35,938 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:35,938 INFO L82 PathProgramCache]: Analyzing trace with hash -765411196, now seen corresponding path program 462 times [2021-06-05 14:41:35,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:35,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165838327] [2021-06-05 14:41:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:35,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:35,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165838327] [2021-06-05 14:41:35,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165838327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:35,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124719043] [2021-06-05 14:41:35,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:36,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:41:36,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:36,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:36,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:36,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124719043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:36,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:36,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:36,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521600068] [2021-06-05 14:41:36,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:36,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:36,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:36,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:36,286 INFO L87 Difference]: Start difference. First operand 806 states and 2780 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:36,728 INFO L93 Difference]: Finished difference Result 1152 states and 3680 transitions. [2021-06-05 14:41:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:41:36,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:36,729 INFO L225 Difference]: With dead ends: 1152 [2021-06-05 14:41:36,729 INFO L226 Difference]: Without dead ends: 1145 [2021-06-05 14:41:36,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 422.4ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:41:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-06-05 14:41:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 818. [2021-06-05 14:41:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.445532435740514) internal successors, (2815), 817 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-06-05 14:41:36,739 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-06-05 14:41:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:36,739 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-06-05 14:41:36,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-06-05 14:41:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:36,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:36,740 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:36,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5161,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:36,940 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1602491628, now seen corresponding path program 463 times [2021-06-05 14:41:36,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:36,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314887814] [2021-06-05 14:41:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:37,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:37,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314887814] [2021-06-05 14:41:37,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314887814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:37,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53250973] [2021-06-05 14:41:37,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:37,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:37,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:37,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53250973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:37,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:37,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:37,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540241456] [2021-06-05 14:41:37,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:37,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:37,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:37,309 INFO L87 Difference]: Start difference. First operand 818 states and 2815 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:37,727 INFO L93 Difference]: Finished difference Result 1098 states and 3559 transitions. [2021-06-05 14:41:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:37,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:37,729 INFO L225 Difference]: With dead ends: 1098 [2021-06-05 14:41:37,729 INFO L226 Difference]: Without dead ends: 1098 [2021-06-05 14:41:37,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 407.7ms TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-06-05 14:41:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 816. [2021-06-05 14:41:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.4478527607361964) internal successors, (2810), 815 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2810 transitions. [2021-06-05 14:41:37,739 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2810 transitions. Word has length 20 [2021-06-05 14:41:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:37,739 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2810 transitions. [2021-06-05 14:41:37,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2810 transitions. [2021-06-05 14:41:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:37,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:37,740 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:37,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5169,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:37,940 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:37,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1629429072, now seen corresponding path program 464 times [2021-06-05 14:41:37,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:37,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367377528] [2021-06-05 14:41:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:38,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:38,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367377528] [2021-06-05 14:41:38,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367377528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:38,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39227736] [2021-06-05 14:41:38,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:38,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:38,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:38,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:38,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39227736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:38,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:38,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:38,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017608745] [2021-06-05 14:41:38,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:38,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:38,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:38,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:38,230 INFO L87 Difference]: Start difference. First operand 816 states and 2810 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:38,890 INFO L93 Difference]: Finished difference Result 1312 states and 4126 transitions. [2021-06-05 14:41:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:41:38,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:38,892 INFO L225 Difference]: With dead ends: 1312 [2021-06-05 14:41:38,892 INFO L226 Difference]: Without dead ends: 1312 [2021-06-05 14:41:38,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:41:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-06-05 14:41:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 813. [2021-06-05 14:41:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.4433497536945814) internal successors, (2796), 812 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2796 transitions. [2021-06-05 14:41:38,902 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2796 transitions. Word has length 20 [2021-06-05 14:41:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:38,902 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2796 transitions. [2021-06-05 14:41:38,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2796 transitions. [2021-06-05 14:41:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:38,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:38,903 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:39,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5179 [2021-06-05 14:41:39,103 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:39,104 INFO L82 PathProgramCache]: Analyzing trace with hash -337086672, now seen corresponding path program 465 times [2021-06-05 14:41:39,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:39,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244282496] [2021-06-05 14:41:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:39,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:39,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244282496] [2021-06-05 14:41:39,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244282496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:39,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786212580] [2021-06-05 14:41:39,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:39,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:39,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:39,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:39,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:39,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786212580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:39,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:39,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:39,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048071635] [2021-06-05 14:41:39,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:39,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:39,403 INFO L87 Difference]: Start difference. First operand 813 states and 2796 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:40,076 INFO L93 Difference]: Finished difference Result 1281 states and 4059 transitions. [2021-06-05 14:41:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:41:40,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:40,078 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 14:41:40,078 INFO L226 Difference]: Without dead ends: 1281 [2021-06-05 14:41:40,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 550.6ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-06-05 14:41:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 812. [2021-06-05 14:41:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.4401972872996303) internal successors, (2790), 811 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2790 transitions. [2021-06-05 14:41:40,088 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2790 transitions. Word has length 20 [2021-06-05 14:41:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:40,088 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2790 transitions. [2021-06-05 14:41:40,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2790 transitions. [2021-06-05 14:41:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:40,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:40,089 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:40,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5187 [2021-06-05 14:41:40,289 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:40,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1608692544, now seen corresponding path program 466 times [2021-06-05 14:41:40,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:40,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042256127] [2021-06-05 14:41:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:40,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:40,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042256127] [2021-06-05 14:41:40,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042256127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:40,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233556177] [2021-06-05 14:41:40,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:40,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:40,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:40,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:40,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:40,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233556177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:40,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:40,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:40,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867141759] [2021-06-05 14:41:40,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:40,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:40,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:40,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:40,569 INFO L87 Difference]: Start difference. First operand 812 states and 2790 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:40,903 INFO L93 Difference]: Finished difference Result 1105 states and 3580 transitions. [2021-06-05 14:41:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:40,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:40,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:40,905 INFO L225 Difference]: With dead ends: 1105 [2021-06-05 14:41:40,905 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 14:41:40,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 14:41:40,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 822. [2021-06-05 14:41:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.433617539585871) internal successors, (2819), 821 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2819 transitions. [2021-06-05 14:41:40,914 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2819 transitions. Word has length 20 [2021-06-05 14:41:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:40,914 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2819 transitions. [2021-06-05 14:41:40,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2819 transitions. [2021-06-05 14:41:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:40,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:40,915 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:41,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5193 [2021-06-05 14:41:41,115 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:41,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:41,116 INFO L82 PathProgramCache]: Analyzing trace with hash 770850826, now seen corresponding path program 467 times [2021-06-05 14:41:41,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:41,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162592678] [2021-06-05 14:41:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:41,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:41,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162592678] [2021-06-05 14:41:41,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162592678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:41,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929453985] [2021-06-05 14:41:41,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:41,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:41:41,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:41,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:41,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:41,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929453985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:41,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:41,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:41,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591521541] [2021-06-05 14:41:41,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:41,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:41,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:41,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:41,416 INFO L87 Difference]: Start difference. First operand 822 states and 2819 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:41,819 INFO L93 Difference]: Finished difference Result 1200 states and 3828 transitions. [2021-06-05 14:41:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:41,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:41,821 INFO L225 Difference]: With dead ends: 1200 [2021-06-05 14:41:41,821 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 14:41:41,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 14:41:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 812. [2021-06-05 14:41:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.4401972872996303) internal successors, (2790), 811 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2790 transitions. [2021-06-05 14:41:41,831 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2790 transitions. Word has length 20 [2021-06-05 14:41:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:41,831 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2790 transitions. [2021-06-05 14:41:41,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2790 transitions. [2021-06-05 14:41:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:41,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:41,832 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:42,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5201 [2021-06-05 14:41:42,032 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:42,033 INFO L82 PathProgramCache]: Analyzing trace with hash 511239572, now seen corresponding path program 468 times [2021-06-05 14:41:42,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:42,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044580268] [2021-06-05 14:41:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:42,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:42,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044580268] [2021-06-05 14:41:42,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044580268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:42,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294439581] [2021-06-05 14:41:42,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:42,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:42,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:42,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:42,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:42,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294439581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:42,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:42,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:42,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820936726] [2021-06-05 14:41:42,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:42,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:42,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:42,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:42,454 INFO L87 Difference]: Start difference. First operand 812 states and 2790 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:42,767 INFO L93 Difference]: Finished difference Result 1058 states and 3468 transitions. [2021-06-05 14:41:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:42,767 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:42,768 INFO L225 Difference]: With dead ends: 1058 [2021-06-05 14:41:42,769 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 14:41:42,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 14:41:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 800. [2021-06-05 14:41:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.439299123904881) internal successors, (2748), 799 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2748 transitions. [2021-06-05 14:41:42,777 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2748 transitions. Word has length 20 [2021-06-05 14:41:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:42,777 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2748 transitions. [2021-06-05 14:41:42,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2748 transitions. [2021-06-05 14:41:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:42,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:42,778 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:42,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5209 [2021-06-05 14:41:42,979 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:42,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2047493274, now seen corresponding path program 469 times [2021-06-05 14:41:42,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:42,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388020082] [2021-06-05 14:41:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:43,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:43,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388020082] [2021-06-05 14:41:43,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388020082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:43,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255818958] [2021-06-05 14:41:43,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:43,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:43,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255818958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:43,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:43,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:43,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918431543] [2021-06-05 14:41:43,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:43,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:43,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:43,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:43,299 INFO L87 Difference]: Start difference. First operand 800 states and 2748 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:43,649 INFO L93 Difference]: Finished difference Result 1176 states and 3748 transitions. [2021-06-05 14:41:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:43,651 INFO L225 Difference]: With dead ends: 1176 [2021-06-05 14:41:43,651 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 14:41:43,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:41:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 14:41:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 821. [2021-06-05 14:41:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4414634146341463) internal successors, (2822), 820 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:43,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2822 transitions. [2021-06-05 14:41:43,661 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2822 transitions. Word has length 20 [2021-06-05 14:41:43,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:43,661 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2822 transitions. [2021-06-05 14:41:43,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2822 transitions. [2021-06-05 14:41:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:43,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:43,662 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:43,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5221 [2021-06-05 14:41:43,862 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash -753061784, now seen corresponding path program 470 times [2021-06-05 14:41:43,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:43,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665577260] [2021-06-05 14:41:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:43,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:43,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665577260] [2021-06-05 14:41:43,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665577260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:43,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375149] [2021-06-05 14:41:43,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:44,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:44,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:44,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:44,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:44,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:44,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:44,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610878669] [2021-06-05 14:41:44,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:44,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:44,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:44,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:44,184 INFO L87 Difference]: Start difference. First operand 821 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:44,779 INFO L93 Difference]: Finished difference Result 1218 states and 3844 transitions. [2021-06-05 14:41:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:41:44,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:44,781 INFO L225 Difference]: With dead ends: 1218 [2021-06-05 14:41:44,781 INFO L226 Difference]: Without dead ends: 1218 [2021-06-05 14:41:44,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 546.3ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-06-05 14:41:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 821. [2021-06-05 14:41:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4414634146341463) internal successors, (2822), 820 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2822 transitions. [2021-06-05 14:41:44,791 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2822 transitions. Word has length 20 [2021-06-05 14:41:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:44,791 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2822 transitions. [2021-06-05 14:41:44,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2822 transitions. [2021-06-05 14:41:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:44,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:44,793 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:44,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5230 [2021-06-05 14:41:44,993 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2047997790, now seen corresponding path program 471 times [2021-06-05 14:41:44,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:44,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017190626] [2021-06-05 14:41:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:45,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:45,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017190626] [2021-06-05 14:41:45,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017190626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:45,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387930038] [2021-06-05 14:41:45,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:45,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:45,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:45,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:45,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:45,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387930038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:45,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:45,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:45,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568988128] [2021-06-05 14:41:45,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:45,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:45,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:45,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:45,299 INFO L87 Difference]: Start difference. First operand 821 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:45,927 INFO L93 Difference]: Finished difference Result 1143 states and 3655 transitions. [2021-06-05 14:41:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:41:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:45,929 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 14:41:45,929 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 14:41:45,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 567.7ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:45,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 14:41:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 821. [2021-06-05 14:41:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4378048780487807) internal successors, (2819), 820 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2819 transitions. [2021-06-05 14:41:45,938 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2819 transitions. Word has length 20 [2021-06-05 14:41:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:45,938 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2819 transitions. [2021-06-05 14:41:45,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2819 transitions. [2021-06-05 14:41:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:45,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:45,939 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:46,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5237 [2021-06-05 14:41:46,140 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash 607054956, now seen corresponding path program 472 times [2021-06-05 14:41:46,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:46,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49263123] [2021-06-05 14:41:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:46,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:46,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49263123] [2021-06-05 14:41:46,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49263123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:46,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539275326] [2021-06-05 14:41:46,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:46,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:46,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:46,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:46,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539275326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:46,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:46,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:46,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347074031] [2021-06-05 14:41:46,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:46,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:46,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:46,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:46,435 INFO L87 Difference]: Start difference. First operand 821 states and 2819 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:46,798 INFO L93 Difference]: Finished difference Result 1125 states and 3628 transitions. [2021-06-05 14:41:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:46,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:46,800 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 14:41:46,800 INFO L226 Difference]: Without dead ends: 1125 [2021-06-05 14:41:46,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:41:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-06-05 14:41:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 818. [2021-06-05 14:41:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.440636474908201) internal successors, (2811), 817 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2811 transitions. [2021-06-05 14:41:46,810 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2811 transitions. Word has length 20 [2021-06-05 14:41:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:46,810 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2811 transitions. [2021-06-05 14:41:46,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2811 transitions. [2021-06-05 14:41:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:46,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:46,811 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:47,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5245 [2021-06-05 14:41:47,012 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1709113928, now seen corresponding path program 473 times [2021-06-05 14:41:47,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:47,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339308159] [2021-06-05 14:41:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:47,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:47,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339308159] [2021-06-05 14:41:47,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339308159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:47,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95175134] [2021-06-05 14:41:47,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:47,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:47,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:47,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:47,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:47,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95175134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:47,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:47,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:47,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8584628] [2021-06-05 14:41:47,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:47,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:47,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:47,333 INFO L87 Difference]: Start difference. First operand 818 states and 2811 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:47,949 INFO L93 Difference]: Finished difference Result 1046 states and 3427 transitions. [2021-06-05 14:41:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:47,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:47,950 INFO L225 Difference]: With dead ends: 1046 [2021-06-05 14:41:47,950 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 14:41:47,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 596.5ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 14:41:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 818. [2021-06-05 14:41:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.436964504283966) internal successors, (2808), 817 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2808 transitions. [2021-06-05 14:41:47,961 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2808 transitions. Word has length 20 [2021-06-05 14:41:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:47,961 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2808 transitions. [2021-06-05 14:41:47,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:47,962 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2808 transitions. [2021-06-05 14:41:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:47,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:47,962 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:48,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5252 [2021-06-05 14:41:48,163 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:48,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:48,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1539115804, now seen corresponding path program 474 times [2021-06-05 14:41:48,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:48,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495599802] [2021-06-05 14:41:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:48,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:48,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495599802] [2021-06-05 14:41:48,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495599802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:48,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825329847] [2021-06-05 14:41:48,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:48,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:48,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:48,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:48,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825329847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:48,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:48,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:41:48,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789892844] [2021-06-05 14:41:48,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:41:48,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:48,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:41:48,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:41:48,439 INFO L87 Difference]: Start difference. First operand 818 states and 2808 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:48,809 INFO L93 Difference]: Finished difference Result 1087 states and 3541 transitions. [2021-06-05 14:41:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:48,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:48,810 INFO L225 Difference]: With dead ends: 1087 [2021-06-05 14:41:48,810 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 14:41:48,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 357.4ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 14:41:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 815. [2021-06-05 14:41:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.43980343980344) internal successors, (2800), 814 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2800 transitions. [2021-06-05 14:41:48,820 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2800 transitions. Word has length 20 [2021-06-05 14:41:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:48,820 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2800 transitions. [2021-06-05 14:41:48,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2800 transitions. [2021-06-05 14:41:48,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:48,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:48,821 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:49,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5262 [2021-06-05 14:41:49,022 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:49,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:49,022 INFO L82 PathProgramCache]: Analyzing trace with hash -428896924, now seen corresponding path program 475 times [2021-06-05 14:41:49,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:49,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628908777] [2021-06-05 14:41:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:49,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:49,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628908777] [2021-06-05 14:41:49,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628908777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:49,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960170174] [2021-06-05 14:41:49,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:49,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:49,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:49,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960170174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:49,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:49,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:49,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983930188] [2021-06-05 14:41:49,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:49,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:49,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:49,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:49,317 INFO L87 Difference]: Start difference. First operand 815 states and 2800 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:49,652 INFO L93 Difference]: Finished difference Result 1274 states and 3975 transitions. [2021-06-05 14:41:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:49,654 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 14:41:49,654 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 14:41:49,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 14:41:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 823. [2021-06-05 14:41:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.451338199513382) internal successors, (2837), 822 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2837 transitions. [2021-06-05 14:41:49,665 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2837 transitions. Word has length 20 [2021-06-05 14:41:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:49,665 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2837 transitions. [2021-06-05 14:41:49,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:49,665 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2837 transitions. [2021-06-05 14:41:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:49,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:49,666 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:49,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5267 [2021-06-05 14:41:49,866 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:49,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:49,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1065515314, now seen corresponding path program 476 times [2021-06-05 14:41:49,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:49,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024288572] [2021-06-05 14:41:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:49,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:49,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024288572] [2021-06-05 14:41:49,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024288572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:49,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732543304] [2021-06-05 14:41:49,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:50,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:50,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:50,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732543304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:50,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:50,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:50,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880568755] [2021-06-05 14:41:50,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:50,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:50,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:50,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:50,183 INFO L87 Difference]: Start difference. First operand 823 states and 2837 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:50,794 INFO L93 Difference]: Finished difference Result 1437 states and 4376 transitions. [2021-06-05 14:41:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:41:50,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:50,795 INFO L225 Difference]: With dead ends: 1437 [2021-06-05 14:41:50,796 INFO L226 Difference]: Without dead ends: 1437 [2021-06-05 14:41:50,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 514.5ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-06-05 14:41:50,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 827. [2021-06-05 14:41:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.4588377723970942) internal successors, (2857), 826 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2857 transitions. [2021-06-05 14:41:50,807 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2857 transitions. Word has length 20 [2021-06-05 14:41:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:50,807 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2857 transitions. [2021-06-05 14:41:50,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2857 transitions. [2021-06-05 14:41:50,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:50,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:50,808 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:51,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5276 [2021-06-05 14:41:51,009 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:51,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:51,009 INFO L82 PathProgramCache]: Analyzing trace with hash -428392408, now seen corresponding path program 477 times [2021-06-05 14:41:51,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:51,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478638826] [2021-06-05 14:41:51,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:51,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:51,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478638826] [2021-06-05 14:41:51,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478638826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:51,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349096574] [2021-06-05 14:41:51,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:51,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:51,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:51,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:51,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349096574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:51,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:51,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:51,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792938863] [2021-06-05 14:41:51,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:51,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:51,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:51,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:51,364 INFO L87 Difference]: Start difference. First operand 827 states and 2857 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:51,922 INFO L93 Difference]: Finished difference Result 1233 states and 3887 transitions. [2021-06-05 14:41:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:41:51,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:51,923 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 14:41:51,923 INFO L226 Difference]: Without dead ends: 1227 [2021-06-05 14:41:51,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 556.4ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:41:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-05 14:41:51,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 833. [2021-06-05 14:41:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4459134615384617) internal successors, (2867), 832 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2867 transitions. [2021-06-05 14:41:51,934 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2867 transitions. Word has length 20 [2021-06-05 14:41:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:51,934 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2867 transitions. [2021-06-05 14:41:51,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2867 transitions. [2021-06-05 14:41:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:51,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:51,935 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:52,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5284 [2021-06-05 14:41:52,136 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1869335242, now seen corresponding path program 478 times [2021-06-05 14:41:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:52,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394439661] [2021-06-05 14:41:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:52,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:52,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394439661] [2021-06-05 14:41:52,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394439661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:52,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086688693] [2021-06-05 14:41:52,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:52,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:52,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:52,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:52,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086688693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:52,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:52,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:52,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549613800] [2021-06-05 14:41:52,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:52,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:52,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:52,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:52,424 INFO L87 Difference]: Start difference. First operand 833 states and 2867 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:52,784 INFO L93 Difference]: Finished difference Result 1222 states and 3859 transitions. [2021-06-05 14:41:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:41:52,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:52,785 INFO L225 Difference]: With dead ends: 1222 [2021-06-05 14:41:52,785 INFO L226 Difference]: Without dead ends: 1222 [2021-06-05 14:41:52,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:52,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-05 14:41:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 827. [2021-06-05 14:41:52,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.444309927360775) internal successors, (2845), 826 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2845 transitions. [2021-06-05 14:41:52,796 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2845 transitions. Word has length 20 [2021-06-05 14:41:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:52,796 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2845 transitions. [2021-06-05 14:41:52,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2845 transitions. [2021-06-05 14:41:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:52,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:52,797 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:52,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5297 [2021-06-05 14:41:52,997 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1614033668, now seen corresponding path program 479 times [2021-06-05 14:41:52,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:52,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252241915] [2021-06-05 14:41:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:53,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:53,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252241915] [2021-06-05 14:41:53,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252241915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:53,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123667865] [2021-06-05 14:41:53,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:53,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:41:53,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:53,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:53,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:53,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123667865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:53,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:53,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:53,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074074891] [2021-06-05 14:41:53,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:53,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:53,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:53,295 INFO L87 Difference]: Start difference. First operand 827 states and 2845 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:53,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:53,665 INFO L93 Difference]: Finished difference Result 1194 states and 3789 transitions. [2021-06-05 14:41:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:53,665 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:53,667 INFO L225 Difference]: With dead ends: 1194 [2021-06-05 14:41:53,667 INFO L226 Difference]: Without dead ends: 1187 [2021-06-05 14:41:53,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-06-05 14:41:53,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 831. [2021-06-05 14:41:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.444578313253012) internal successors, (2859), 830 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2859 transitions. [2021-06-05 14:41:53,677 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2859 transitions. Word has length 20 [2021-06-05 14:41:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:53,677 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2859 transitions. [2021-06-05 14:41:53,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2859 transitions. [2021-06-05 14:41:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:53,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:53,678 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:53,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5305,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:53,878 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:53,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:53,879 INFO L82 PathProgramCache]: Analyzing trace with hash 753869156, now seen corresponding path program 480 times [2021-06-05 14:41:53,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:53,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058768016] [2021-06-05 14:41:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:53,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:53,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058768016] [2021-06-05 14:41:53,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058768016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:53,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179615696] [2021-06-05 14:41:53,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:54,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:54,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:54,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:54,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:54,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179615696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:54,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:54,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:54,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765463717] [2021-06-05 14:41:54,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:54,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:54,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:54,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:54,173 INFO L87 Difference]: Start difference. First operand 831 states and 2859 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:54,484 INFO L93 Difference]: Finished difference Result 1116 states and 3627 transitions. [2021-06-05 14:41:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:41:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:54,486 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 14:41:54,486 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 14:41:54,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 14:41:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 829. [2021-06-05 14:41:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4468599033816427) internal successors, (2854), 828 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2854 transitions. [2021-06-05 14:41:54,495 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2854 transitions. Word has length 20 [2021-06-05 14:41:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:54,496 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2854 transitions. [2021-06-05 14:41:54,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2854 transitions. [2021-06-05 14:41:54,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:54,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:54,497 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:54,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5312,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:54,697 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:54,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:54,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1816915752, now seen corresponding path program 481 times [2021-06-05 14:41:54,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:54,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015156234] [2021-06-05 14:41:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:54,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:54,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015156234] [2021-06-05 14:41:54,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015156234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:54,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61046700] [2021-06-05 14:41:54,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:54,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:54,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:55,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61046700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:55,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:55,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:55,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791926152] [2021-06-05 14:41:55,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:55,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:55,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:55,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:55,035 INFO L87 Difference]: Start difference. First operand 829 states and 2854 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:55,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:55,523 INFO L93 Difference]: Finished difference Result 1262 states and 3969 transitions. [2021-06-05 14:41:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:55,524 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:55,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:55,525 INFO L225 Difference]: With dead ends: 1262 [2021-06-05 14:41:55,525 INFO L226 Difference]: Without dead ends: 1262 [2021-06-05 14:41:55,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-06-05 14:41:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 820. [2021-06-05 14:41:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.451770451770452) internal successors, (2827), 819 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2827 transitions. [2021-06-05 14:41:55,535 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2827 transitions. Word has length 20 [2021-06-05 14:41:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:55,536 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2827 transitions. [2021-06-05 14:41:55,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2827 transitions. [2021-06-05 14:41:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:55,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:55,537 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:55,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-06-05 14:41:55,737 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:55,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1185709144, now seen corresponding path program 482 times [2021-06-05 14:41:55,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:55,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504266385] [2021-06-05 14:41:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:55,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:55,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504266385] [2021-06-05 14:41:55,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504266385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:55,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031459289] [2021-06-05 14:41:55,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:55,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:55,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:56,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031459289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:56,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:56,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:56,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665394821] [2021-06-05 14:41:56,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:56,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:56,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:56,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:56,058 INFO L87 Difference]: Start difference. First operand 820 states and 2827 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:56,525 INFO L93 Difference]: Finished difference Result 1225 states and 3887 transitions. [2021-06-05 14:41:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:56,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:56,526 INFO L225 Difference]: With dead ends: 1225 [2021-06-05 14:41:56,526 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 14:41:56,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 450.0ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:41:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 14:41:56,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 819. [2021-06-05 14:41:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4486552567237165) internal successors, (2821), 818 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2821 transitions. [2021-06-05 14:41:56,536 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2821 transitions. Word has length 20 [2021-06-05 14:41:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:56,536 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2821 transitions. [2021-06-05 14:41:56,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2821 transitions. [2021-06-05 14:41:56,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:56,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:56,537 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:56,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5336,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:56,738 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1837652280, now seen corresponding path program 483 times [2021-06-05 14:41:56,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:56,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72769682] [2021-06-05 14:41:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:56,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:56,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72769682] [2021-06-05 14:41:56,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72769682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:56,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445353568] [2021-06-05 14:41:56,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:56,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:56,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:56,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:57,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445353568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:57,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:57,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:57,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977581512] [2021-06-05 14:41:57,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:57,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:57,049 INFO L87 Difference]: Start difference. First operand 819 states and 2821 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:57,532 INFO L93 Difference]: Finished difference Result 1133 states and 3646 transitions. [2021-06-05 14:41:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:57,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:57,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:57,533 INFO L225 Difference]: With dead ends: 1133 [2021-06-05 14:41:57,533 INFO L226 Difference]: Without dead ends: 1127 [2021-06-05 14:41:57,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:57,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-06-05 14:41:57,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 829. [2021-06-05 14:41:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4396135265700485) internal successors, (2848), 828 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2848 transitions. [2021-06-05 14:41:57,543 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2848 transitions. Word has length 20 [2021-06-05 14:41:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:57,543 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2848 transitions. [2021-06-05 14:41:57,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2848 transitions. [2021-06-05 14:41:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:57,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:57,544 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:57,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5350 [2021-06-05 14:41:57,745 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash -77771646, now seen corresponding path program 484 times [2021-06-05 14:41:57,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:57,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053173848] [2021-06-05 14:41:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:57,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:57,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053173848] [2021-06-05 14:41:57,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053173848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:57,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169160000] [2021-06-05 14:41:57,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:57,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:57,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:57,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:58,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169160000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:58,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:58,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:58,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846269189] [2021-06-05 14:41:58,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:58,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:58,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:58,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:58,056 INFO L87 Difference]: Start difference. First operand 829 states and 2848 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:58,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:58,516 INFO L93 Difference]: Finished difference Result 1232 states and 3904 transitions. [2021-06-05 14:41:58,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:58,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:58,518 INFO L225 Difference]: With dead ends: 1232 [2021-06-05 14:41:58,518 INFO L226 Difference]: Without dead ends: 1232 [2021-06-05 14:41:58,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:41:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-06-05 14:41:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 819. [2021-06-05 14:41:58,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4486552567237165) internal successors, (2821), 818 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2821 transitions. [2021-06-05 14:41:58,528 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2821 transitions. Word has length 20 [2021-06-05 14:41:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:58,528 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2821 transitions. [2021-06-05 14:41:58,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2821 transitions. [2021-06-05 14:41:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:58,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:58,529 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:58,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5360,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:58,729 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:58,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:58,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1961720668, now seen corresponding path program 485 times [2021-06-05 14:41:58,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:58,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849425769] [2021-06-05 14:41:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:58,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849425769] [2021-06-05 14:41:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849425769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937308988] [2021-06-05 14:41:58,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:58,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:41:58,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:58,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:58,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:59,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937308988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:59,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:59,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:59,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127422282] [2021-06-05 14:41:59,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:59,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:59,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:59,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:59,032 INFO L87 Difference]: Start difference. First operand 819 states and 2821 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:59,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:59,321 INFO L93 Difference]: Finished difference Result 1162 states and 3733 transitions. [2021-06-05 14:41:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:41:59,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:41:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:59,323 INFO L225 Difference]: With dead ends: 1162 [2021-06-05 14:41:59,323 INFO L226 Difference]: Without dead ends: 1162 [2021-06-05 14:41:59,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:59,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-05 14:41:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 822. [2021-06-05 14:41:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.454323995127893) internal successors, (2836), 821 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:59,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2836 transitions. [2021-06-05 14:41:59,333 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2836 transitions. Word has length 20 [2021-06-05 14:41:59,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:59,333 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2836 transitions. [2021-06-05 14:41:59,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:59,333 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2836 transitions. [2021-06-05 14:41:59,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:41:59,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:59,334 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:59,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5370,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:59,534 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:59,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:59,534 INFO L82 PathProgramCache]: Analyzing trace with hash -337382900, now seen corresponding path program 486 times [2021-06-05 14:41:59,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:59,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600965411] [2021-06-05 14:41:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:59,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:59,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600965411] [2021-06-05 14:41:59,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600965411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:59,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440156103] [2021-06-05 14:41:59,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:59,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:59,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:59,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:41:59,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:59,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440156103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:59,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:59,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:41:59,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244440015] [2021-06-05 14:41:59,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:41:59,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:41:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:41:59,823 INFO L87 Difference]: Start difference. First operand 822 states and 2836 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:00,142 INFO L93 Difference]: Finished difference Result 1126 states and 3653 transitions. [2021-06-05 14:42:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:00,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:00,144 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 14:42:00,144 INFO L226 Difference]: Without dead ends: 1126 [2021-06-05 14:42:00,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:00,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-06-05 14:42:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 818. [2021-06-05 14:42:00,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.445532435740514) internal successors, (2815), 817 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-06-05 14:42:00,153 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-06-05 14:42:00,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:00,153 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-06-05 14:42:00,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-06-05 14:42:00,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:00,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:00,154 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:00,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5378,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:00,355 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:00,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:00,355 INFO L82 PathProgramCache]: Analyzing trace with hash -181205336, now seen corresponding path program 487 times [2021-06-05 14:42:00,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:00,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228733353] [2021-06-05 14:42:00,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:00,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:00,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228733353] [2021-06-05 14:42:00,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228733353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:00,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389250048] [2021-06-05 14:42:00,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:00,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:00,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389250048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:00,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:00,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:00,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706997458] [2021-06-05 14:42:00,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:00,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:00,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:00,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:00,682 INFO L87 Difference]: Start difference. First operand 818 states and 2815 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:01,380 INFO L93 Difference]: Finished difference Result 1040 states and 3418 transitions. [2021-06-05 14:42:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:01,382 INFO L225 Difference]: With dead ends: 1040 [2021-06-05 14:42:01,382 INFO L226 Difference]: Without dead ends: 1028 [2021-06-05 14:42:01,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 679.1ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-05 14:42:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 820. [2021-06-05 14:42:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.445665445665446) internal successors, (2822), 819 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-06-05 14:42:01,391 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-06-05 14:42:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:01,391 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-06-05 14:42:01,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:01,391 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-06-05 14:42:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:01,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:01,392 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:01,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5386,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:01,592 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:01,593 INFO L82 PathProgramCache]: Analyzing trace with hash 570195102, now seen corresponding path program 488 times [2021-06-05 14:42:01,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:01,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917821496] [2021-06-05 14:42:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:01,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:01,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917821496] [2021-06-05 14:42:01,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917821496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:01,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210920292] [2021-06-05 14:42:01,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:01,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:01,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:01,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:01,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210920292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:01,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:01,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:01,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507250719] [2021-06-05 14:42:01,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:01,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:01,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:01,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:01,902 INFO L87 Difference]: Start difference. First operand 820 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:02,476 INFO L93 Difference]: Finished difference Result 1065 states and 3470 transitions. [2021-06-05 14:42:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:02,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:02,478 INFO L225 Difference]: With dead ends: 1065 [2021-06-05 14:42:02,478 INFO L226 Difference]: Without dead ends: 1059 [2021-06-05 14:42:02,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 546.4ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-06-05 14:42:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 830. [2021-06-05 14:42:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.436670687575392) internal successors, (2849), 829 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2849 transitions. [2021-06-05 14:42:02,487 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2849 transitions. Word has length 20 [2021-06-05 14:42:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:02,487 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2849 transitions. [2021-06-05 14:42:02,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2849 transitions. [2021-06-05 14:42:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:02,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:02,488 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:02,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5393 [2021-06-05 14:42:02,689 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1345228824, now seen corresponding path program 489 times [2021-06-05 14:42:02,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:02,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790754425] [2021-06-05 14:42:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:02,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:02,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790754425] [2021-06-05 14:42:02,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790754425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:02,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043699924] [2021-06-05 14:42:02,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:02,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:02,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:03,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043699924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:03,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:03,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:03,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456926465] [2021-06-05 14:42:03,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:03,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:03,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:03,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:03,008 INFO L87 Difference]: Start difference. First operand 830 states and 2849 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:03,641 INFO L93 Difference]: Finished difference Result 1158 states and 3713 transitions. [2021-06-05 14:42:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:03,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:03,643 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 14:42:03,643 INFO L226 Difference]: Without dead ends: 1158 [2021-06-05 14:42:03,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 571.4ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-06-05 14:42:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 818. [2021-06-05 14:42:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.445532435740514) internal successors, (2815), 817 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-06-05 14:42:03,653 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-06-05 14:42:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:03,653 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-06-05 14:42:03,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-06-05 14:42:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:03,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:03,654 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:03,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5401,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:03,854 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash -108096714, now seen corresponding path program 490 times [2021-06-05 14:42:03,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:03,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693218942] [2021-06-05 14:42:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:03,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:03,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693218942] [2021-06-05 14:42:03,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693218942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:03,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102641359] [2021-06-05 14:42:03,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:04,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:04,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:04,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:04,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:04,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102641359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:04,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:04,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:04,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498682742] [2021-06-05 14:42:04,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:04,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:04,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:04,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:04,132 INFO L87 Difference]: Start difference. First operand 818 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:04,496 INFO L93 Difference]: Finished difference Result 1075 states and 3518 transitions. [2021-06-05 14:42:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:04,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:04,498 INFO L225 Difference]: With dead ends: 1075 [2021-06-05 14:42:04,498 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 14:42:04,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 348.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 14:42:04,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 817. [2021-06-05 14:42:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.4473039215686274) internal successors, (2813), 816 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2813 transitions. [2021-06-05 14:42:04,508 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2813 transitions. Word has length 20 [2021-06-05 14:42:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:04,508 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2813 transitions. [2021-06-05 14:42:04,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:04,508 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2813 transitions. [2021-06-05 14:42:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:04,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:04,509 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:04,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5413 [2021-06-05 14:42:04,709 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash 643303724, now seen corresponding path program 491 times [2021-06-05 14:42:04,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:04,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758821378] [2021-06-05 14:42:04,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:04,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:04,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758821378] [2021-06-05 14:42:04,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758821378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:04,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141059702] [2021-06-05 14:42:04,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:04,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:04,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:04,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:04,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:05,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141059702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:05,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:05,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:05,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117441980] [2021-06-05 14:42:05,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:05,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:05,008 INFO L87 Difference]: Start difference. First operand 817 states and 2813 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:05,381 INFO L93 Difference]: Finished difference Result 1095 states and 3557 transitions. [2021-06-05 14:42:05,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:05,382 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:05,383 INFO L225 Difference]: With dead ends: 1095 [2021-06-05 14:42:05,383 INFO L226 Difference]: Without dead ends: 1095 [2021-06-05 14:42:05,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-06-05 14:42:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 816. [2021-06-05 14:42:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.445398773006135) internal successors, (2808), 815 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2808 transitions. [2021-06-05 14:42:05,392 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2808 transitions. Word has length 20 [2021-06-05 14:42:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:05,392 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2808 transitions. [2021-06-05 14:42:05,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2808 transitions. [2021-06-05 14:42:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:05,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:05,393 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:05,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5418,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:05,594 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:05,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2027325804, now seen corresponding path program 492 times [2021-06-05 14:42:05,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:05,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211094227] [2021-06-05 14:42:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:05,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:05,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211094227] [2021-06-05 14:42:05,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211094227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:05,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035094656] [2021-06-05 14:42:05,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:05,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:05,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:05,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:05,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:05,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035094656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:05,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:05,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:05,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856483731] [2021-06-05 14:42:05,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:05,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:05,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:05,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:05,934 INFO L87 Difference]: Start difference. First operand 816 states and 2808 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:06,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:06,249 INFO L93 Difference]: Finished difference Result 1053 states and 3462 transitions. [2021-06-05 14:42:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:06,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:06,250 INFO L225 Difference]: With dead ends: 1053 [2021-06-05 14:42:06,250 INFO L226 Difference]: Without dead ends: 1053 [2021-06-05 14:42:06,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-05 14:42:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 797. [2021-06-05 14:42:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4321608040201004) internal successors, (2732), 796 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2732 transitions. [2021-06-05 14:42:06,259 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2732 transitions. Word has length 20 [2021-06-05 14:42:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:06,259 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2732 transitions. [2021-06-05 14:42:06,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2732 transitions. [2021-06-05 14:42:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:06,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:06,260 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:06,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5425,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:06,461 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash 432548454, now seen corresponding path program 493 times [2021-06-05 14:42:06,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:06,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98653427] [2021-06-05 14:42:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:06,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:06,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98653427] [2021-06-05 14:42:06,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98653427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:06,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456992580] [2021-06-05 14:42:06,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:06,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:06,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:06,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456992580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:06,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:06,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:42:06,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205461398] [2021-06-05 14:42:06,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:42:06,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:06,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:42:06,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:42:06,690 INFO L87 Difference]: Start difference. First operand 797 states and 2732 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:07,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:07,050 INFO L93 Difference]: Finished difference Result 1260 states and 3974 transitions. [2021-06-05 14:42:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:07,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:07,052 INFO L225 Difference]: With dead ends: 1260 [2021-06-05 14:42:07,052 INFO L226 Difference]: Without dead ends: 1260 [2021-06-05 14:42:07,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-06-05 14:42:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 797. [2021-06-05 14:42:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4321608040201004) internal successors, (2732), 796 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2732 transitions. [2021-06-05 14:42:07,070 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2732 transitions. Word has length 20 [2021-06-05 14:42:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:07,070 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2732 transitions. [2021-06-05 14:42:07,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2732 transitions. [2021-06-05 14:42:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:07,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:07,071 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:07,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5433,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:07,272 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1990759516, now seen corresponding path program 494 times [2021-06-05 14:42:07,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:07,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553161010] [2021-06-05 14:42:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:07,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:07,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553161010] [2021-06-05 14:42:07,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553161010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:07,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580753410] [2021-06-05 14:42:07,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:07,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:07,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:07,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:07,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:07,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580753410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:07,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:07,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:07,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960378926] [2021-06-05 14:42:07,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:07,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:07,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:07,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:07,584 INFO L87 Difference]: Start difference. First operand 797 states and 2732 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:08,180 INFO L93 Difference]: Finished difference Result 1403 states and 4327 transitions. [2021-06-05 14:42:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:42:08,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:08,182 INFO L225 Difference]: With dead ends: 1403 [2021-06-05 14:42:08,182 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 14:42:08,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 537.6ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 14:42:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 803. [2021-06-05 14:42:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.4301745635910224) internal successors, (2751), 802 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2751 transitions. [2021-06-05 14:42:08,192 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2751 transitions. Word has length 20 [2021-06-05 14:42:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:08,192 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2751 transitions. [2021-06-05 14:42:08,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2751 transitions. [2021-06-05 14:42:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:08,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:08,193 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:08,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5437,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:08,394 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:08,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1595849562, now seen corresponding path program 495 times [2021-06-05 14:42:08,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:08,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472913741] [2021-06-05 14:42:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:08,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:08,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472913741] [2021-06-05 14:42:08,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472913741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:08,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195250562] [2021-06-05 14:42:08,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:08,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:08,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:08,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195250562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:08,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:08,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:08,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448798891] [2021-06-05 14:42:08,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:08,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:08,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:08,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:08,656 INFO L87 Difference]: Start difference. First operand 803 states and 2751 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:09,825 INFO L93 Difference]: Finished difference Result 1586 states and 4789 transitions. [2021-06-05 14:42:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:42:09,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:09,827 INFO L225 Difference]: With dead ends: 1586 [2021-06-05 14:42:09,827 INFO L226 Difference]: Without dead ends: 1586 [2021-06-05 14:42:09,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1031.7ms TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:42:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-05 14:42:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 798. [2021-06-05 14:42:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4429109159347555) internal successors, (2744), 797 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2744 transitions. [2021-06-05 14:42:09,839 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2744 transitions. Word has length 20 [2021-06-05 14:42:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:09,839 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2744 transitions. [2021-06-05 14:42:09,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2744 transitions. [2021-06-05 14:42:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:09,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:09,840 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:10,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5441,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:10,041 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash 655741044, now seen corresponding path program 496 times [2021-06-05 14:42:10,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:10,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851630945] [2021-06-05 14:42:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:10,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:10,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851630945] [2021-06-05 14:42:10,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851630945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:10,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075629444] [2021-06-05 14:42:10,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:10,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:10,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:10,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:10,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:10,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075629444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:10,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:10,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176115035] [2021-06-05 14:42:10,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:10,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:10,340 INFO L87 Difference]: Start difference. First operand 798 states and 2744 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:10,854 INFO L93 Difference]: Finished difference Result 1322 states and 4159 transitions. [2021-06-05 14:42:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:42:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:10,856 INFO L225 Difference]: With dead ends: 1322 [2021-06-05 14:42:10,856 INFO L226 Difference]: Without dead ends: 1297 [2021-06-05 14:42:10,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-05 14:42:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 798. [2021-06-05 14:42:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.437892095357591) internal successors, (2740), 797 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2740 transitions. [2021-06-05 14:42:10,866 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2740 transitions. Word has length 20 [2021-06-05 14:42:10,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:10,866 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2740 transitions. [2021-06-05 14:42:10,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2740 transitions. [2021-06-05 14:42:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:10,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:10,867 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:11,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5449,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:11,067 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:11,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:11,067 INFO L82 PathProgramCache]: Analyzing trace with hash 40903004, now seen corresponding path program 497 times [2021-06-05 14:42:11,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:11,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863878637] [2021-06-05 14:42:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:11,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:11,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863878637] [2021-06-05 14:42:11,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863878637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:11,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970640120] [2021-06-05 14:42:11,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:11,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:11,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:11,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:11,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:11,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970640120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:11,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:11,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:11,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513056111] [2021-06-05 14:42:11,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:11,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:11,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:11,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:11,395 INFO L87 Difference]: Start difference. First operand 798 states and 2740 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:11,912 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 14:42:12,022 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-06-05 14:42:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:12,096 INFO L93 Difference]: Finished difference Result 1271 states and 4059 transitions. [2021-06-05 14:42:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:12,098 INFO L225 Difference]: With dead ends: 1271 [2021-06-05 14:42:12,098 INFO L226 Difference]: Without dead ends: 1271 [2021-06-05 14:42:12,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 709.0ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-05 14:42:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 792. [2021-06-05 14:42:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4424778761061945) internal successors, (2723), 791 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2723 transitions. [2021-06-05 14:42:12,108 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2723 transitions. Word has length 20 [2021-06-05 14:42:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:12,108 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2723 transitions. [2021-06-05 14:42:12,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2723 transitions. [2021-06-05 14:42:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:12,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:12,109 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:12,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5456,526 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:12,310 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash 973863644, now seen corresponding path program 498 times [2021-06-05 14:42:12,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:12,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101154384] [2021-06-05 14:42:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:12,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:12,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101154384] [2021-06-05 14:42:12,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101154384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:12,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777512211] [2021-06-05 14:42:12,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:12,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:42:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:12,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:12,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777512211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:12,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:12,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:12,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360944253] [2021-06-05 14:42:12,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:12,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:12,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:12,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:12,593 INFO L87 Difference]: Start difference. First operand 792 states and 2723 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:12,933 INFO L93 Difference]: Finished difference Result 1401 states and 4368 transitions. [2021-06-05 14:42:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:12,935 INFO L225 Difference]: With dead ends: 1401 [2021-06-05 14:42:12,935 INFO L226 Difference]: Without dead ends: 1401 [2021-06-05 14:42:12,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:12,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-05 14:42:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 798. [2021-06-05 14:42:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4466750313676284) internal successors, (2747), 797 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2747 transitions. [2021-06-05 14:42:12,946 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2747 transitions. Word has length 20 [2021-06-05 14:42:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:12,946 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2747 transitions. [2021-06-05 14:42:12,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2747 transitions. [2021-06-05 14:42:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:12,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:12,947 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:13,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5463 [2021-06-05 14:42:13,148 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:13,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:13,148 INFO L82 PathProgramCache]: Analyzing trace with hash 58849244, now seen corresponding path program 499 times [2021-06-05 14:42:13,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:13,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041356888] [2021-06-05 14:42:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:13,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:13,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041356888] [2021-06-05 14:42:13,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041356888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:13,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021750338] [2021-06-05 14:42:13,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:13,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:13,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:13,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021750338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:13,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:13,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:13,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8576285] [2021-06-05 14:42:13,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:13,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:13,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:13,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:13,423 INFO L87 Difference]: Start difference. First operand 798 states and 2747 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:13,792 INFO L93 Difference]: Finished difference Result 1325 states and 4183 transitions. [2021-06-05 14:42:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:13,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:13,794 INFO L225 Difference]: With dead ends: 1325 [2021-06-05 14:42:13,794 INFO L226 Difference]: Without dead ends: 1325 [2021-06-05 14:42:13,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-06-05 14:42:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 801. [2021-06-05 14:42:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.4525) internal successors, (2762), 800 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2762 transitions. [2021-06-05 14:42:13,804 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2762 transitions. Word has length 20 [2021-06-05 14:42:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:13,804 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2762 transitions. [2021-06-05 14:42:13,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2762 transitions. [2021-06-05 14:42:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:13,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:13,805 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:14,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5468,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:14,006 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash -707996904, now seen corresponding path program 500 times [2021-06-05 14:42:14,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:14,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118013704] [2021-06-05 14:42:14,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:14,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:14,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118013704] [2021-06-05 14:42:14,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118013704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:14,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39864699] [2021-06-05 14:42:14,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:14,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:14,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:14,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:14,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:14,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39864699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:14,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:14,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:14,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928517700] [2021-06-05 14:42:14,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:14,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:14,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:14,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:14,277 INFO L87 Difference]: Start difference. First operand 801 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:14,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:14,725 INFO L93 Difference]: Finished difference Result 1357 states and 4264 transitions. [2021-06-05 14:42:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:14,727 INFO L225 Difference]: With dead ends: 1357 [2021-06-05 14:42:14,727 INFO L226 Difference]: Without dead ends: 1357 [2021-06-05 14:42:14,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-06-05 14:42:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 802. [2021-06-05 14:42:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.4556803995006242) internal successors, (2768), 801 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2768 transitions. [2021-06-05 14:42:14,737 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2768 transitions. Word has length 20 [2021-06-05 14:42:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:14,737 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2768 transitions. [2021-06-05 14:42:14,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2768 transitions. [2021-06-05 14:42:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:14,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:14,738 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:14,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5472,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:14,939 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:14,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1629833436, now seen corresponding path program 501 times [2021-06-05 14:42:14,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:14,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901614047] [2021-06-05 14:42:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:15,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:15,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901614047] [2021-06-05 14:42:15,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901614047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:15,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470760177] [2021-06-05 14:42:15,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:15,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:15,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:15,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:15,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:15,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470760177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:15,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:15,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:15,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090511929] [2021-06-05 14:42:15,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:15,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:15,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:15,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:15,210 INFO L87 Difference]: Start difference. First operand 802 states and 2768 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:15,542 INFO L93 Difference]: Finished difference Result 1324 states and 4187 transitions. [2021-06-05 14:42:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:15,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:15,544 INFO L225 Difference]: With dead ends: 1324 [2021-06-05 14:42:15,544 INFO L226 Difference]: Without dead ends: 1324 [2021-06-05 14:42:15,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:15,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-06-05 14:42:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 792. [2021-06-05 14:42:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4424778761061945) internal successors, (2723), 791 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2723 transitions. [2021-06-05 14:42:15,554 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2723 transitions. Word has length 20 [2021-06-05 14:42:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:15,554 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2723 transitions. [2021-06-05 14:42:15,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2723 transitions. [2021-06-05 14:42:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:15,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:15,555 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:15,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5478,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:15,755 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:15,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:15,755 INFO L82 PathProgramCache]: Analyzing trace with hash 819892878, now seen corresponding path program 502 times [2021-06-05 14:42:15,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:15,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750353251] [2021-06-05 14:42:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:15,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:15,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750353251] [2021-06-05 14:42:15,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750353251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:15,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408916915] [2021-06-05 14:42:15,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:15,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:15,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:15,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:15,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:16,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408916915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:16,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:16,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:16,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112549613] [2021-06-05 14:42:16,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:16,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:16,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:16,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:16,027 INFO L87 Difference]: Start difference. First operand 792 states and 2723 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:16,624 INFO L93 Difference]: Finished difference Result 1452 states and 4481 transitions. [2021-06-05 14:42:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:16,625 INFO L225 Difference]: With dead ends: 1452 [2021-06-05 14:42:16,625 INFO L226 Difference]: Without dead ends: 1452 [2021-06-05 14:42:16,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 505.0ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:42:16,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-06-05 14:42:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 799. [2021-06-05 14:42:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.443609022556391) internal successors, (2748), 798 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2748 transitions. [2021-06-05 14:42:16,636 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2748 transitions. Word has length 20 [2021-06-05 14:42:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:16,636 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2748 transitions. [2021-06-05 14:42:16,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2748 transitions. [2021-06-05 14:42:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:16,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:16,637 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:16,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5484 [2021-06-05 14:42:16,837 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1528251096, now seen corresponding path program 503 times [2021-06-05 14:42:16,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:16,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984190864] [2021-06-05 14:42:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:16,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:16,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984190864] [2021-06-05 14:42:16,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984190864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:16,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050149031] [2021-06-05 14:42:16,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:17,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:17,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:17,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:17,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050149031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:17,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:17,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:17,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947405174] [2021-06-05 14:42:17,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:17,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:17,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:17,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:17,122 INFO L87 Difference]: Start difference. First operand 799 states and 2748 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:18,021 INFO L93 Difference]: Finished difference Result 1547 states and 4730 transitions. [2021-06-05 14:42:18,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:42:18,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:18,023 INFO L225 Difference]: With dead ends: 1547 [2021-06-05 14:42:18,023 INFO L226 Difference]: Without dead ends: 1547 [2021-06-05 14:42:18,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 796.2ms TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:42:18,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-06-05 14:42:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 793. [2021-06-05 14:42:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4457070707070705) internal successors, (2729), 792 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-06-05 14:42:18,034 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-06-05 14:42:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:18,035 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-06-05 14:42:18,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-06-05 14:42:18,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:18,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:18,036 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:18,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5489,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:18,236 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:18,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:18,236 INFO L82 PathProgramCache]: Analyzing trace with hash -641746940, now seen corresponding path program 504 times [2021-06-05 14:42:18,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:18,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626051071] [2021-06-05 14:42:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:18,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:18,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626051071] [2021-06-05 14:42:18,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626051071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:18,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112292430] [2021-06-05 14:42:18,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:18,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:42:18,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:18,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:18,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:18,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112292430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:18,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:18,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:18,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006196843] [2021-06-05 14:42:18,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:18,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:18,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:18,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:18,590 INFO L87 Difference]: Start difference. First operand 793 states and 2729 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:19,238 INFO L93 Difference]: Finished difference Result 1317 states and 4151 transitions. [2021-06-05 14:42:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:42:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:19,240 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 14:42:19,240 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 14:42:19,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 14:42:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 793. [2021-06-05 14:42:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4457070707070705) internal successors, (2729), 792 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-06-05 14:42:19,250 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-06-05 14:42:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:19,250 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-06-05 14:42:19,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-06-05 14:42:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:19,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:19,251 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:19,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5497 [2021-06-05 14:42:19,452 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:19,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1656497320, now seen corresponding path program 505 times [2021-06-05 14:42:19,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:19,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364718689] [2021-06-05 14:42:19,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:19,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:19,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364718689] [2021-06-05 14:42:19,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364718689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:19,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816045639] [2021-06-05 14:42:19,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:19,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:19,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:19,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816045639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:19,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:19,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:19,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806759036] [2021-06-05 14:42:19,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:19,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:19,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:19,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:19,728 INFO L87 Difference]: Start difference. First operand 793 states and 2729 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:20,159 INFO L93 Difference]: Finished difference Result 1362 states and 4275 transitions. [2021-06-05 14:42:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:20,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:20,160 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 14:42:20,160 INFO L226 Difference]: Without dead ends: 1362 [2021-06-05 14:42:20,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-06-05 14:42:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 796. [2021-06-05 14:42:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.4515723270440253) internal successors, (2744), 795 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2744 transitions. [2021-06-05 14:42:20,171 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2744 transitions. Word has length 20 [2021-06-05 14:42:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:20,171 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2744 transitions. [2021-06-05 14:42:20,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2744 transitions. [2021-06-05 14:42:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:20,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:20,172 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:20,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5506,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:20,372 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:20,372 INFO L82 PathProgramCache]: Analyzing trace with hash -473731240, now seen corresponding path program 506 times [2021-06-05 14:42:20,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:20,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376411747] [2021-06-05 14:42:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:20,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:20,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376411747] [2021-06-05 14:42:20,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376411747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:20,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911984608] [2021-06-05 14:42:20,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:20,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:20,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:20,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:20,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911984608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:20,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:20,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:20,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940349522] [2021-06-05 14:42:20,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:20,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:20,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:20,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:20,667 INFO L87 Difference]: Start difference. First operand 796 states and 2744 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:21,252 INFO L93 Difference]: Finished difference Result 1393 states and 4360 transitions. [2021-06-05 14:42:21,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:21,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:21,254 INFO L225 Difference]: With dead ends: 1393 [2021-06-05 14:42:21,254 INFO L226 Difference]: Without dead ends: 1393 [2021-06-05 14:42:21,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 501.5ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:42:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-06-05 14:42:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 797. [2021-06-05 14:42:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4547738693467336) internal successors, (2750), 796 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2750 transitions. [2021-06-05 14:42:21,265 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2750 transitions. Word has length 20 [2021-06-05 14:42:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:21,265 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2750 transitions. [2021-06-05 14:42:21,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2750 transitions. [2021-06-05 14:42:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:21,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:21,266 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:21,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5510,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:21,466 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1864099100, now seen corresponding path program 507 times [2021-06-05 14:42:21,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:21,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225735246] [2021-06-05 14:42:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:21,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:21,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225735246] [2021-06-05 14:42:21,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225735246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:21,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492970718] [2021-06-05 14:42:21,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:21,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:21,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:21,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492970718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:21,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:21,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:21,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765222367] [2021-06-05 14:42:21,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:21,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:21,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:21,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:21,762 INFO L87 Difference]: Start difference. First operand 797 states and 2750 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:22,246 INFO L93 Difference]: Finished difference Result 1350 states and 4257 transitions. [2021-06-05 14:42:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:22,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:22,247 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 14:42:22,247 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 14:42:22,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 398.3ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 14:42:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 793. [2021-06-05 14:42:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4457070707070705) internal successors, (2729), 792 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-06-05 14:42:22,258 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-06-05 14:42:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:22,258 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-06-05 14:42:22,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-06-05 14:42:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:22,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:22,259 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:22,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5517 [2021-06-05 14:42:22,459 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1335697110, now seen corresponding path program 508 times [2021-06-05 14:42:22,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:22,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036157613] [2021-06-05 14:42:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:22,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:22,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036157613] [2021-06-05 14:42:22,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036157613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:22,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371280321] [2021-06-05 14:42:22,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:22,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:22,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:22,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:22,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371280321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:22,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:22,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:22,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680931848] [2021-06-05 14:42:22,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:22,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:22,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:22,746 INFO L87 Difference]: Start difference. First operand 793 states and 2729 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:23,858 INFO L93 Difference]: Finished difference Result 1614 states and 4881 transitions. [2021-06-05 14:42:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:42:23,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:23,860 INFO L225 Difference]: With dead ends: 1614 [2021-06-05 14:42:23,860 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 14:42:23,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1022.6ms TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:42:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 14:42:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 795. [2021-06-05 14:42:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.452141057934509) internal successors, (2741), 794 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2741 transitions. [2021-06-05 14:42:23,872 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2741 transitions. Word has length 20 [2021-06-05 14:42:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:23,872 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2741 transitions. [2021-06-05 14:42:23,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2741 transitions. [2021-06-05 14:42:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:23,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:23,873 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:24,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5524,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:24,074 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:24,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1647343268, now seen corresponding path program 509 times [2021-06-05 14:42:24,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:24,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027027479] [2021-06-05 14:42:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:24,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:24,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027027479] [2021-06-05 14:42:24,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027027479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:24,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428210131] [2021-06-05 14:42:24,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:24,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:24,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:24,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:24,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:24,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428210131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:24,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:24,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:24,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195029978] [2021-06-05 14:42:24,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:24,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:24,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:24,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:24,423 INFO L87 Difference]: Start difference. First operand 795 states and 2741 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:25,250 INFO L93 Difference]: Finished difference Result 1340 states and 4219 transitions. [2021-06-05 14:42:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:42:25,250 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:25,251 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 14:42:25,251 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 14:42:25,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 802.3ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 14:42:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 798. [2021-06-05 14:42:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4579673776662485) internal successors, (2756), 797 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2756 transitions. [2021-06-05 14:42:25,262 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2756 transitions. Word has length 20 [2021-06-05 14:42:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:25,262 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2756 transitions. [2021-06-05 14:42:25,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2756 transitions. [2021-06-05 14:42:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:25,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:25,263 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:25,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5532,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:25,464 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash -584296672, now seen corresponding path program 510 times [2021-06-05 14:42:25,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:25,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254023618] [2021-06-05 14:42:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:25,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:25,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254023618] [2021-06-05 14:42:25,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254023618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:25,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116554243] [2021-06-05 14:42:25,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:25,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:42:25,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:25,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:25,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:25,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116554243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:25,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:25,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:25,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131196608] [2021-06-05 14:42:25,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:25,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:25,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:25,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:25,746 INFO L87 Difference]: Start difference. First operand 798 states and 2756 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:26,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:26,614 INFO L93 Difference]: Finished difference Result 1502 states and 4647 transitions. [2021-06-05 14:42:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:42:26,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:26,616 INFO L225 Difference]: With dead ends: 1502 [2021-06-05 14:42:26,616 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 14:42:26,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 790.8ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:42:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 14:42:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 799. [2021-06-05 14:42:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.4611528822055138) internal successors, (2762), 798 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2762 transitions. [2021-06-05 14:42:26,627 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2762 transitions. Word has length 20 [2021-06-05 14:42:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:26,627 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2762 transitions. [2021-06-05 14:42:26,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2762 transitions. [2021-06-05 14:42:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:26,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:26,628 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:26,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5541 [2021-06-05 14:42:26,828 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:26,828 INFO L82 PathProgramCache]: Analyzing trace with hash 708045728, now seen corresponding path program 511 times [2021-06-05 14:42:26,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:26,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113749701] [2021-06-05 14:42:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:26,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:26,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113749701] [2021-06-05 14:42:26,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113749701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:26,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175107800] [2021-06-05 14:42:26,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:27,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:27,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:27,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175107800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:27,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:27,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:27,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721683827] [2021-06-05 14:42:27,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:27,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:27,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:27,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:27,106 INFO L87 Difference]: Start difference. First operand 799 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:27,906 INFO L93 Difference]: Finished difference Result 1471 states and 4580 transitions. [2021-06-05 14:42:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:42:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:27,908 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 14:42:27,908 INFO L226 Difference]: Without dead ends: 1471 [2021-06-05 14:42:27,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 724.9ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:42:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-06-05 14:42:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 798. [2021-06-05 14:42:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4579673776662485) internal successors, (2756), 797 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2756 transitions. [2021-06-05 14:42:27,919 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2756 transitions. Word has length 20 [2021-06-05 14:42:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:27,919 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2756 transitions. [2021-06-05 14:42:27,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2756 transitions. [2021-06-05 14:42:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:27,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:27,920 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:28,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5548,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:28,120 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:28,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1815983226, now seen corresponding path program 512 times [2021-06-05 14:42:28,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:28,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703438653] [2021-06-05 14:42:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:28,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:28,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703438653] [2021-06-05 14:42:28,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703438653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:28,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092419358] [2021-06-05 14:42:28,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:28,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:28,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:28,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:28,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092419358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:28,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:28,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:28,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259249536] [2021-06-05 14:42:28,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:28,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:28,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:28,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:28,396 INFO L87 Difference]: Start difference. First operand 798 states and 2756 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:28,840 INFO L93 Difference]: Finished difference Result 1344 states and 4231 transitions. [2021-06-05 14:42:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:28,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:28,842 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 14:42:28,842 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 14:42:28,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 14:42:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 800. [2021-06-05 14:42:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.460575719649562) internal successors, (2765), 799 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2765 transitions. [2021-06-05 14:42:28,852 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2765 transitions. Word has length 20 [2021-06-05 14:42:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:28,852 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2765 transitions. [2021-06-05 14:42:28,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2765 transitions. [2021-06-05 14:42:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:28,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:28,853 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:29,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5555,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:29,054 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:29,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1556371972, now seen corresponding path program 513 times [2021-06-05 14:42:29,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:29,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225346714] [2021-06-05 14:42:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:29,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:29,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225346714] [2021-06-05 14:42:29,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225346714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:29,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935576381] [2021-06-05 14:42:29,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:29,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:42:29,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:29,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:29,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:29,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935576381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:29,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:29,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:29,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442282019] [2021-06-05 14:42:29,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:29,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:29,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:29,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:29,409 INFO L87 Difference]: Start difference. First operand 800 states and 2765 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:29,944 INFO L93 Difference]: Finished difference Result 1282 states and 4102 transitions. [2021-06-05 14:42:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:29,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:29,946 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 14:42:29,946 INFO L226 Difference]: Without dead ends: 1282 [2021-06-05 14:42:29,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 569.1ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:29,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-06-05 14:42:29,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 793. [2021-06-05 14:42:29,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4444444444444446) internal successors, (2728), 792 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2728 transitions. [2021-06-05 14:42:29,956 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2728 transitions. Word has length 20 [2021-06-05 14:42:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:29,956 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2728 transitions. [2021-06-05 14:42:29,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2728 transitions. [2021-06-05 14:42:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:29,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:29,957 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:30,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5563 [2021-06-05 14:42:30,157 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:30,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2131358622, now seen corresponding path program 514 times [2021-06-05 14:42:30,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:30,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582651002] [2021-06-05 14:42:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:30,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:30,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582651002] [2021-06-05 14:42:30,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582651002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:30,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049020205] [2021-06-05 14:42:30,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:30,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:30,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:30,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:30,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049020205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:30,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:30,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:30,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541960510] [2021-06-05 14:42:30,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:30,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:30,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:30,407 INFO L87 Difference]: Start difference. First operand 793 states and 2728 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:30,694 INFO L93 Difference]: Finished difference Result 1144 states and 3667 transitions. [2021-06-05 14:42:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:42:30,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:30,696 INFO L225 Difference]: With dead ends: 1144 [2021-06-05 14:42:30,696 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 14:42:30,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:42:30,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 14:42:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 793. [2021-06-05 14:42:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4393939393939394) internal successors, (2724), 792 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2724 transitions. [2021-06-05 14:42:30,705 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2724 transitions. Word has length 20 [2021-06-05 14:42:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:30,705 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2724 transitions. [2021-06-05 14:42:30,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2724 transitions. [2021-06-05 14:42:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:30,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:30,706 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:30,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5574 [2021-06-05 14:42:30,907 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:30,907 INFO L82 PathProgramCache]: Analyzing trace with hash 285793542, now seen corresponding path program 515 times [2021-06-05 14:42:30,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:30,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43213885] [2021-06-05 14:42:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:30,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:30,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43213885] [2021-06-05 14:42:30,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43213885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:30,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816382445] [2021-06-05 14:42:30,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:31,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:31,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:31,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:31,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816382445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:31,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:31,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:31,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135451952] [2021-06-05 14:42:31,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:31,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:31,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:31,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:31,189 INFO L87 Difference]: Start difference. First operand 793 states and 2724 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:31,534 INFO L93 Difference]: Finished difference Result 1168 states and 3711 transitions. [2021-06-05 14:42:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:31,534 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:31,535 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 14:42:31,535 INFO L226 Difference]: Without dead ends: 1154 [2021-06-05 14:42:31,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-06-05 14:42:31,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 795. [2021-06-05 14:42:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.4395465994962215) internal successors, (2731), 794 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:31,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2731 transitions. [2021-06-05 14:42:31,545 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2731 transitions. Word has length 20 [2021-06-05 14:42:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:31,545 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2731 transitions. [2021-06-05 14:42:31,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2731 transitions. [2021-06-05 14:42:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:31,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:31,546 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:31,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5580,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:31,746 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:31,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2011600566, now seen corresponding path program 516 times [2021-06-05 14:42:31,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:31,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222779431] [2021-06-05 14:42:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:31,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:31,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222779431] [2021-06-05 14:42:31,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222779431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:31,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661022347] [2021-06-05 14:42:31,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:31,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:42:31,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:31,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:32,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661022347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:32,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:32,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:32,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14388111] [2021-06-05 14:42:32,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:32,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:32,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:32,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:32,024 INFO L87 Difference]: Start difference. First operand 795 states and 2731 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:32,529 INFO L93 Difference]: Finished difference Result 1193 states and 3763 transitions. [2021-06-05 14:42:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:42:32,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:32,531 INFO L225 Difference]: With dead ends: 1193 [2021-06-05 14:42:32,531 INFO L226 Difference]: Without dead ends: 1186 [2021-06-05 14:42:32,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-05 14:42:32,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 806. [2021-06-05 14:42:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.4285714285714284) internal successors, (2760), 805 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2760 transitions. [2021-06-05 14:42:32,541 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2760 transitions. Word has length 20 [2021-06-05 14:42:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:32,541 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2760 transitions. [2021-06-05 14:42:32,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2760 transitions. [2021-06-05 14:42:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:32,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:32,542 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:32,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5586 [2021-06-05 14:42:32,742 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1516520582, now seen corresponding path program 517 times [2021-06-05 14:42:32,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:32,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969632202] [2021-06-05 14:42:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:32,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:32,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969632202] [2021-06-05 14:42:32,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969632202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:32,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833691620] [2021-06-05 14:42:32,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:32,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:32,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:33,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833691620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:33,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:33,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:33,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754764563] [2021-06-05 14:42:33,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:33,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:33,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:33,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:33,017 INFO L87 Difference]: Start difference. First operand 806 states and 2760 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:33,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:33,358 INFO L93 Difference]: Finished difference Result 1133 states and 3652 transitions. [2021-06-05 14:42:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:33,359 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:33,360 INFO L225 Difference]: With dead ends: 1133 [2021-06-05 14:42:33,360 INFO L226 Difference]: Without dead ends: 1133 [2021-06-05 14:42:33,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-06-05 14:42:33,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 789. [2021-06-05 14:42:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.4441624365482233) internal successors, (2714), 788 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2714 transitions. [2021-06-05 14:42:33,369 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2714 transitions. Word has length 20 [2021-06-05 14:42:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:33,370 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 2714 transitions. [2021-06-05 14:42:33,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2714 transitions. [2021-06-05 14:42:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:33,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:33,371 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:33,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5594 [2021-06-05 14:42:33,571 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:33,571 INFO L82 PathProgramCache]: Analyzing trace with hash -284214296, now seen corresponding path program 518 times [2021-06-05 14:42:33,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:33,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090217848] [2021-06-05 14:42:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:33,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:33,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090217848] [2021-06-05 14:42:33,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090217848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:33,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724352708] [2021-06-05 14:42:33,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:33,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:33,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:33,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:33,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:33,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724352708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:33,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:33,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:33,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855285602] [2021-06-05 14:42:33,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:33,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:33,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:33,837 INFO L87 Difference]: Start difference. First operand 789 states and 2714 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:34,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:34,160 INFO L93 Difference]: Finished difference Result 1125 states and 3613 transitions. [2021-06-05 14:42:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:34,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:34,162 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 14:42:34,162 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 14:42:34,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 14:42:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 793. [2021-06-05 14:42:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4444444444444446) internal successors, (2728), 792 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2728 transitions. [2021-06-05 14:42:34,171 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2728 transitions. Word has length 20 [2021-06-05 14:42:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:34,171 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2728 transitions. [2021-06-05 14:42:34,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2728 transitions. [2021-06-05 14:42:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:34,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:34,172 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:34,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5599,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:34,373 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1713358892, now seen corresponding path program 519 times [2021-06-05 14:42:34,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:34,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148256164] [2021-06-05 14:42:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:34,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:34,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148256164] [2021-06-05 14:42:34,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148256164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:34,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431600892] [2021-06-05 14:42:34,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:34,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:34,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:34,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:34,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:34,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431600892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:34,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:34,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:34,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629817820] [2021-06-05 14:42:34,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:34,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:34,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:34,657 INFO L87 Difference]: Start difference. First operand 793 states and 2728 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:35,043 INFO L93 Difference]: Finished difference Result 1150 states and 3665 transitions. [2021-06-05 14:42:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:42:35,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:35,045 INFO L225 Difference]: With dead ends: 1150 [2021-06-05 14:42:35,045 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 14:42:35,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:35,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 14:42:35,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 804. [2021-06-05 14:42:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.4333748443337484) internal successors, (2757), 803 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2757 transitions. [2021-06-05 14:42:35,054 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2757 transitions. Word has length 20 [2021-06-05 14:42:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:35,054 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2757 transitions. [2021-06-05 14:42:35,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2757 transitions. [2021-06-05 14:42:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:35,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:35,055 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:35,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5606 [2021-06-05 14:42:35,256 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:35,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash 946512744, now seen corresponding path program 520 times [2021-06-05 14:42:35,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:35,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536940077] [2021-06-05 14:42:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:35,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536940077] [2021-06-05 14:42:35,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536940077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029125592] [2021-06-05 14:42:35,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:35,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:35,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:35,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:35,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:35,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029125592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:35,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:35,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:35,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329064700] [2021-06-05 14:42:35,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:35,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:35,520 INFO L87 Difference]: Start difference. First operand 804 states and 2757 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:35,845 INFO L93 Difference]: Finished difference Result 1152 states and 3670 transitions. [2021-06-05 14:42:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:35,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:35,847 INFO L225 Difference]: With dead ends: 1152 [2021-06-05 14:42:35,847 INFO L226 Difference]: Without dead ends: 1152 [2021-06-05 14:42:35,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-06-05 14:42:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 791. [2021-06-05 14:42:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.4443037974683546) internal successors, (2721), 790 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2721 transitions. [2021-06-05 14:42:35,856 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2721 transitions. Word has length 20 [2021-06-05 14:42:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:35,856 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 2721 transitions. [2021-06-05 14:42:35,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2721 transitions. [2021-06-05 14:42:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:35,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:35,857 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:36,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5611,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:36,057 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:36,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash -501136808, now seen corresponding path program 521 times [2021-06-05 14:42:36,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:36,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169964430] [2021-06-05 14:42:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:36,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:36,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169964430] [2021-06-05 14:42:36,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169964430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:36,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871031231] [2021-06-05 14:42:36,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:36,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:36,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:36,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:36,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:36,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:36,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:42:36,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:36,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:36,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:36,286 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-06-05 14:42:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:36,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871031231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:36,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:36,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:36,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679022735] [2021-06-05 14:42:36,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:36,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:36,310 INFO L87 Difference]: Start difference. First operand 791 states and 2721 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:36,586 INFO L93 Difference]: Finished difference Result 1219 states and 3829 transitions. [2021-06-05 14:42:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:36,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:36,587 INFO L225 Difference]: With dead ends: 1219 [2021-06-05 14:42:36,587 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 14:42:36,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 14:42:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 806. [2021-06-05 14:42:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.431055900621118) internal successors, (2762), 805 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2762 transitions. [2021-06-05 14:42:36,599 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2762 transitions. Word has length 20 [2021-06-05 14:42:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:36,599 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2762 transitions. [2021-06-05 14:42:36,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2762 transitions. [2021-06-05 14:42:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:36,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:36,600 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:36,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5617 [2021-06-05 14:42:36,801 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1267982956, now seen corresponding path program 522 times [2021-06-05 14:42:36,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:36,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16272125] [2021-06-05 14:42:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:36,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:36,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16272125] [2021-06-05 14:42:36,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16272125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:36,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898046547] [2021-06-05 14:42:36,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:36,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:42:36,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:36,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:36,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:37,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:42:37,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:37,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:37,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:37,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:37,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:37,039 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-05 14:42:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:37,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898046547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:37,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:37,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:37,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800640415] [2021-06-05 14:42:37,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:37,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:37,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:37,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:37,062 INFO L87 Difference]: Start difference. First operand 806 states and 2762 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:37,407 INFO L93 Difference]: Finished difference Result 1247 states and 3888 transitions. [2021-06-05 14:42:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:42:37,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:37,408 INFO L225 Difference]: With dead ends: 1247 [2021-06-05 14:42:37,408 INFO L226 Difference]: Without dead ends: 1247 [2021-06-05 14:42:37,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-06-05 14:42:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 804. [2021-06-05 14:42:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.4333748443337484) internal successors, (2757), 803 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2757 transitions. [2021-06-05 14:42:37,419 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2757 transitions. Word has length 20 [2021-06-05 14:42:37,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:37,419 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2757 transitions. [2021-06-05 14:42:37,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,419 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2757 transitions. [2021-06-05 14:42:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:37,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:37,420 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:37,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5624,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:37,621 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash -92492312, now seen corresponding path program 523 times [2021-06-05 14:42:37,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:37,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361248084] [2021-06-05 14:42:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:37,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:37,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361248084] [2021-06-05 14:42:37,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361248084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:37,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277283113] [2021-06-05 14:42:37,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:37,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:37,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:37,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:42:37,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:37,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:37,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:37,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:37,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:37,848 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-05 14:42:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:37,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277283113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:37,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:37,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:42:37,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258189204] [2021-06-05 14:42:37,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:42:37,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:37,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:42:37,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:42:37,859 INFO L87 Difference]: Start difference. First operand 804 states and 2757 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:38,103 INFO L93 Difference]: Finished difference Result 1188 states and 3774 transitions. [2021-06-05 14:42:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:38,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:38,105 INFO L225 Difference]: With dead ends: 1188 [2021-06-05 14:42:38,105 INFO L226 Difference]: Without dead ends: 1188 [2021-06-05 14:42:38,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:42:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-06-05 14:42:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 791. [2021-06-05 14:42:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.4443037974683546) internal successors, (2721), 790 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2721 transitions. [2021-06-05 14:42:38,123 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2721 transitions. Word has length 20 [2021-06-05 14:42:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:38,123 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 2721 transitions. [2021-06-05 14:42:38,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:38,123 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2721 transitions. [2021-06-05 14:42:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:38,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:38,124 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:38,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5633,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:38,324 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:38,325 INFO L82 PathProgramCache]: Analyzing trace with hash 167624360, now seen corresponding path program 524 times [2021-06-05 14:42:38,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:38,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041776771] [2021-06-05 14:42:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:38,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:38,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041776771] [2021-06-05 14:42:38,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041776771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:38,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946730984] [2021-06-05 14:42:38,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:38,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:38,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:38,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:38,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:38,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946730984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:38,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:38,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:42:38,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790894979] [2021-06-05 14:42:38,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:42:38,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:38,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:42:38,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:42:38,548 INFO L87 Difference]: Start difference. First operand 791 states and 2721 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:38,750 INFO L93 Difference]: Finished difference Result 1189 states and 3834 transitions. [2021-06-05 14:42:38,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:38,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:38,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:38,752 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 14:42:38,752 INFO L226 Difference]: Without dead ends: 1189 [2021-06-05 14:42:38,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-05 14:42:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 786. [2021-06-05 14:42:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.443312101910828) internal successors, (2703), 785 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:38,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2703 transitions. [2021-06-05 14:42:38,762 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2703 transitions. Word has length 20 [2021-06-05 14:42:38,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:38,762 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 2703 transitions. [2021-06-05 14:42:38,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:38,762 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2703 transitions. [2021-06-05 14:42:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:38,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:38,763 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:38,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5640 [2021-06-05 14:42:38,964 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:38,964 INFO L82 PathProgramCache]: Analyzing trace with hash -747390040, now seen corresponding path program 525 times [2021-06-05 14:42:38,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:38,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053373661] [2021-06-05 14:42:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:39,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:39,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053373661] [2021-06-05 14:42:39,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053373661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:39,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356599060] [2021-06-05 14:42:39,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:39,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:39,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:39,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:39,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356599060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:39,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:39,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:39,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825954660] [2021-06-05 14:42:39,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:39,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:39,208 INFO L87 Difference]: Start difference. First operand 786 states and 2703 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:39,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:39,374 INFO L93 Difference]: Finished difference Result 1178 states and 3806 transitions. [2021-06-05 14:42:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:39,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:39,376 INFO L225 Difference]: With dead ends: 1178 [2021-06-05 14:42:39,376 INFO L226 Difference]: Without dead ends: 1178 [2021-06-05 14:42:39,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:42:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-06-05 14:42:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 785. [2021-06-05 14:42:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.44515306122449) internal successors, (2701), 784 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2701 transitions. [2021-06-05 14:42:39,393 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2701 transitions. Word has length 20 [2021-06-05 14:42:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:39,393 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2701 transitions. [2021-06-05 14:42:39,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2701 transitions. [2021-06-05 14:42:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:39,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:39,394 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:39,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5643,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:39,594 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1514236188, now seen corresponding path program 526 times [2021-06-05 14:42:39,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:39,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182942301] [2021-06-05 14:42:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:39,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:39,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182942301] [2021-06-05 14:42:39,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182942301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:39,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101158396] [2021-06-05 14:42:39,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:39,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:39,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:39,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:39,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101158396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:39,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:39,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:39,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568110441] [2021-06-05 14:42:39,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:39,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:39,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:39,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:39,843 INFO L87 Difference]: Start difference. First operand 785 states and 2701 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:40,025 INFO L93 Difference]: Finished difference Result 1203 states and 3862 transitions. [2021-06-05 14:42:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:40,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:40,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:40,027 INFO L225 Difference]: With dead ends: 1203 [2021-06-05 14:42:40,027 INFO L226 Difference]: Without dead ends: 1203 [2021-06-05 14:42:40,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:42:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-06-05 14:42:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 782. [2021-06-05 14:42:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.440460947503201) internal successors, (2687), 781 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2687 transitions. [2021-06-05 14:42:40,037 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2687 transitions. Word has length 20 [2021-06-05 14:42:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:40,037 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2687 transitions. [2021-06-05 14:42:40,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2687 transitions. [2021-06-05 14:42:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:40,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:40,038 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:40,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5647,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:40,238 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:40,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:40,238 INFO L82 PathProgramCache]: Analyzing trace with hash 823594152, now seen corresponding path program 527 times [2021-06-05 14:42:40,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:40,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236571875] [2021-06-05 14:42:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:40,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:40,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236571875] [2021-06-05 14:42:40,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236571875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:40,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996557905] [2021-06-05 14:42:40,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:40,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:40,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:40,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:40,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:40,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996557905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:40,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:40,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:40,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620463620] [2021-06-05 14:42:40,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:40,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:40,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:40,489 INFO L87 Difference]: Start difference. First operand 782 states and 2687 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:40,686 INFO L93 Difference]: Finished difference Result 1160 states and 3759 transitions. [2021-06-05 14:42:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:40,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:40,687 INFO L225 Difference]: With dead ends: 1160 [2021-06-05 14:42:40,687 INFO L226 Difference]: Without dead ends: 1160 [2021-06-05 14:42:40,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:42:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-06-05 14:42:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 770. [2021-06-05 14:42:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.423927178153446) internal successors, (2633), 769 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2633 transitions. [2021-06-05 14:42:40,696 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2633 transitions. Word has length 20 [2021-06-05 14:42:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:40,697 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2633 transitions. [2021-06-05 14:42:40,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2633 transitions. [2021-06-05 14:42:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:40,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:40,697 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:40,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5652 [2021-06-05 14:42:40,898 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2052769820, now seen corresponding path program 528 times [2021-06-05 14:42:40,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:40,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463502851] [2021-06-05 14:42:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:40,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:40,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463502851] [2021-06-05 14:42:40,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463502851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:40,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337345978] [2021-06-05 14:42:40,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:41,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:42:41,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:41,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337345978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:41,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:41,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:41,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672272976] [2021-06-05 14:42:41,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:41,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:41,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:41,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:41,137 INFO L87 Difference]: Start difference. First operand 770 states and 2633 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:41,291 INFO L93 Difference]: Finished difference Result 1138 states and 3676 transitions. [2021-06-05 14:42:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:41,292 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:41,293 INFO L225 Difference]: With dead ends: 1138 [2021-06-05 14:42:41,293 INFO L226 Difference]: Without dead ends: 1138 [2021-06-05 14:42:41,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-05 14:42:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 776. [2021-06-05 14:42:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.432258064516129) internal successors, (2660), 775 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2660 transitions. [2021-06-05 14:42:41,302 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2660 transitions. Word has length 20 [2021-06-05 14:42:41,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:41,302 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2660 transitions. [2021-06-05 14:42:41,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2660 transitions. [2021-06-05 14:42:41,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:41,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:41,303 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:41,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5658,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:41,504 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:41,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1285923672, now seen corresponding path program 529 times [2021-06-05 14:42:41,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:41,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788602859] [2021-06-05 14:42:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:41,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:41,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788602859] [2021-06-05 14:42:41,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788602859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:41,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100281471] [2021-06-05 14:42:41,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:41,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:41,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:41,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100281471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:41,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:41,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:41,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26860396] [2021-06-05 14:42:41,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:41,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:41,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:41,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:41,744 INFO L87 Difference]: Start difference. First operand 776 states and 2660 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:41,913 INFO L93 Difference]: Finished difference Result 1180 states and 3783 transitions. [2021-06-05 14:42:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:41,915 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 14:42:41,915 INFO L226 Difference]: Without dead ends: 1180 [2021-06-05 14:42:41,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-06-05 14:42:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 777. [2021-06-05 14:42:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.435567010309278) internal successors, (2666), 776 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2666 transitions. [2021-06-05 14:42:41,932 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2666 transitions. Word has length 20 [2021-06-05 14:42:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:41,932 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2666 transitions. [2021-06-05 14:42:41,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2666 transitions. [2021-06-05 14:42:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:41,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:41,933 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:42,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5662 [2021-06-05 14:42:42,133 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash -671213284, now seen corresponding path program 530 times [2021-06-05 14:42:42,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:42,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879451067] [2021-06-05 14:42:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:42,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:42,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879451067] [2021-06-05 14:42:42,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879451067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:42,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413599716] [2021-06-05 14:42:42,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:42,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:42,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:42,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:42,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:42,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413599716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:42,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:42,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:42,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328976833] [2021-06-05 14:42:42,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:42,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:42,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:42,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:42,378 INFO L87 Difference]: Start difference. First operand 777 states and 2666 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:42,578 INFO L93 Difference]: Finished difference Result 1147 states and 3706 transitions. [2021-06-05 14:42:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:42,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:42,579 INFO L225 Difference]: With dead ends: 1147 [2021-06-05 14:42:42,579 INFO L226 Difference]: Without dead ends: 1147 [2021-06-05 14:42:42,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-05 14:42:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 773. [2021-06-05 14:42:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.4261658031088085) internal successors, (2645), 772 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2645 transitions. [2021-06-05 14:42:42,588 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2645 transitions. Word has length 20 [2021-06-05 14:42:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:42,588 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2645 transitions. [2021-06-05 14:42:42,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2645 transitions. [2021-06-05 14:42:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:42,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:42,589 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:42,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5667 [2021-06-05 14:42:42,790 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:42,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:42,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1833552980, now seen corresponding path program 531 times [2021-06-05 14:42:42,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:42,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721877216] [2021-06-05 14:42:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:42,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:42,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721877216] [2021-06-05 14:42:42,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721877216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:42,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197463513] [2021-06-05 14:42:42,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:42,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:42,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:42,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:42,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:42:42,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:43,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:42:43,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:43,014 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:42:43,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:43,015 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:42:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:43,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197463513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:43,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:43,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:43,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337671977] [2021-06-05 14:42:43,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:43,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:43,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:43,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:43,064 INFO L87 Difference]: Start difference. First operand 773 states and 2645 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:43,296 INFO L93 Difference]: Finished difference Result 1239 states and 3955 transitions. [2021-06-05 14:42:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:43,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:43,298 INFO L225 Difference]: With dead ends: 1239 [2021-06-05 14:42:43,298 INFO L226 Difference]: Without dead ends: 1239 [2021-06-05 14:42:43,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-06-05 14:42:43,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 777. [2021-06-05 14:42:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.431701030927835) internal successors, (2663), 776 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2663 transitions. [2021-06-05 14:42:43,308 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2663 transitions. Word has length 20 [2021-06-05 14:42:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:43,308 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2663 transitions. [2021-06-05 14:42:43,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2663 transitions. [2021-06-05 14:42:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:43,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:43,309 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:43,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5673 [2021-06-05 14:42:43,510 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:43,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:43,510 INFO L82 PathProgramCache]: Analyzing trace with hash 504277360, now seen corresponding path program 532 times [2021-06-05 14:42:43,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:43,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439858462] [2021-06-05 14:42:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:43,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:43,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439858462] [2021-06-05 14:42:43,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439858462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:43,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067576276] [2021-06-05 14:42:43,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:43,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:43,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:43,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:43,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:43,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:42:43,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:43,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:42:43,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:43,737 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:42:43,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:43,738 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:42:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:43,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067576276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:43,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:43,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:43,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684469378] [2021-06-05 14:42:43,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:43,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:43,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:43,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:43,788 INFO L87 Difference]: Start difference. First operand 777 states and 2663 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:43,997 INFO L93 Difference]: Finished difference Result 1245 states and 3970 transitions. [2021-06-05 14:42:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:43,999 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 14:42:43,999 INFO L226 Difference]: Without dead ends: 1245 [2021-06-05 14:42:43,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-05 14:42:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 776. [2021-06-05 14:42:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.4283870967741934) internal successors, (2657), 775 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2657 transitions. [2021-06-05 14:42:44,009 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2657 transitions. Word has length 20 [2021-06-05 14:42:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:44,009 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2657 transitions. [2021-06-05 14:42:44,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,009 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2657 transitions. [2021-06-05 14:42:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:44,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:44,010 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:44,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5679,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:44,211 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2117844094, now seen corresponding path program 533 times [2021-06-05 14:42:44,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:44,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474530116] [2021-06-05 14:42:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:44,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:44,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474530116] [2021-06-05 14:42:44,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474530116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:44,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241674507] [2021-06-05 14:42:44,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:44,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:44,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:44,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:44,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:44,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:42:44,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:44,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:42:44,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:44,488 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:42:44,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:44,489 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:42:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:44,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241674507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:44,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:44,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:42:44,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850061709] [2021-06-05 14:42:44,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:42:44,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:44,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:42:44,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:42:44,554 INFO L87 Difference]: Start difference. First operand 776 states and 2657 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:44,760 INFO L93 Difference]: Finished difference Result 1203 states and 3863 transitions. [2021-06-05 14:42:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:44,762 INFO L225 Difference]: With dead ends: 1203 [2021-06-05 14:42:44,762 INFO L226 Difference]: Without dead ends: 1203 [2021-06-05 14:42:44,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-06-05 14:42:44,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 773. [2021-06-05 14:42:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.4261658031088085) internal successors, (2645), 772 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2645 transitions. [2021-06-05 14:42:44,772 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2645 transitions. Word has length 20 [2021-06-05 14:42:44,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:44,772 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2645 transitions. [2021-06-05 14:42:44,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2645 transitions. [2021-06-05 14:42:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:44,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:44,773 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:44,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5687,562 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:44,973 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:44,973 INFO L82 PathProgramCache]: Analyzing trace with hash -255092834, now seen corresponding path program 534 times [2021-06-05 14:42:44,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:44,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274533550] [2021-06-05 14:42:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:45,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:45,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274533550] [2021-06-05 14:42:45,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274533550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:45,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495110097] [2021-06-05 14:42:45,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:45,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:42:45,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:45,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:45,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495110097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:45,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:45,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:45,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145509555] [2021-06-05 14:42:45,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:45,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:45,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:45,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:45,247 INFO L87 Difference]: Start difference. First operand 773 states and 2645 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:45,592 INFO L93 Difference]: Finished difference Result 1171 states and 3734 transitions. [2021-06-05 14:42:45,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:42:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:45,594 INFO L225 Difference]: With dead ends: 1171 [2021-06-05 14:42:45,594 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 14:42:45,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 14:42:45,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 781. [2021-06-05 14:42:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.4294871794871793) internal successors, (2675), 780 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2675 transitions. [2021-06-05 14:42:45,604 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2675 transitions. Word has length 20 [2021-06-05 14:42:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:45,604 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2675 transitions. [2021-06-05 14:42:45,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2675 transitions. [2021-06-05 14:42:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:45,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:45,605 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:45,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5693 [2021-06-05 14:42:45,805 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:45,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:45,806 INFO L82 PathProgramCache]: Analyzing trace with hash 453265384, now seen corresponding path program 535 times [2021-06-05 14:42:45,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:45,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250179952] [2021-06-05 14:42:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:45,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:45,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250179952] [2021-06-05 14:42:45,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250179952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:45,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598399840] [2021-06-05 14:42:45,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:45,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:46,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598399840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:46,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:46,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:46,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582153074] [2021-06-05 14:42:46,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:46,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:46,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:46,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:46,087 INFO L87 Difference]: Start difference. First operand 781 states and 2675 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:46,533 INFO L93 Difference]: Finished difference Result 1237 states and 3901 transitions. [2021-06-05 14:42:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:46,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:46,534 INFO L225 Difference]: With dead ends: 1237 [2021-06-05 14:42:46,534 INFO L226 Difference]: Without dead ends: 1237 [2021-06-05 14:42:46,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:46,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-05 14:42:46,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 781. [2021-06-05 14:42:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.437179487179487) internal successors, (2681), 780 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2681 transitions. [2021-06-05 14:42:46,545 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2681 transitions. Word has length 20 [2021-06-05 14:42:46,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:46,545 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2681 transitions. [2021-06-05 14:42:46,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:46,545 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2681 transitions. [2021-06-05 14:42:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:46,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:46,546 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:46,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5698,564 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:46,746 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:46,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1716732652, now seen corresponding path program 536 times [2021-06-05 14:42:46,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:46,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597682998] [2021-06-05 14:42:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:46,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:46,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597682998] [2021-06-05 14:42:46,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597682998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:46,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831737344] [2021-06-05 14:42:46,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:46,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:46,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:46,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:46,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:47,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831737344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:47,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:47,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:47,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450586853] [2021-06-05 14:42:47,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:47,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:47,092 INFO L87 Difference]: Start difference. First operand 781 states and 2681 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:47,390 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-06-05 14:42:47,685 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:42:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:47,735 INFO L93 Difference]: Finished difference Result 1192 states and 3776 transitions. [2021-06-05 14:42:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:42:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:47,737 INFO L225 Difference]: With dead ends: 1192 [2021-06-05 14:42:47,737 INFO L226 Difference]: Without dead ends: 1178 [2021-06-05 14:42:47,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 648.1ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-06-05 14:42:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 781. [2021-06-05 14:42:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.4346153846153844) internal successors, (2679), 780 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2679 transitions. [2021-06-05 14:42:47,746 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2679 transitions. Word has length 20 [2021-06-05 14:42:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:47,747 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2679 transitions. [2021-06-05 14:42:47,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2679 transitions. [2021-06-05 14:42:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:47,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:47,748 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:47,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5704,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:47,948 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:47,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2093035288, now seen corresponding path program 537 times [2021-06-05 14:42:47,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:47,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834943907] [2021-06-05 14:42:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:48,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:48,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834943907] [2021-06-05 14:42:48,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834943907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:48,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763583641] [2021-06-05 14:42:48,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:48,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:48,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:48,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763583641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:48,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:48,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:48,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478131661] [2021-06-05 14:42:48,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:48,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:48,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:48,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:48,294 INFO L87 Difference]: Start difference. First operand 781 states and 2679 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:48,795 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 14:42:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:48,878 INFO L93 Difference]: Finished difference Result 1243 states and 3905 transitions. [2021-06-05 14:42:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:48,879 INFO L225 Difference]: With dead ends: 1243 [2021-06-05 14:42:48,879 INFO L226 Difference]: Without dead ends: 1243 [2021-06-05 14:42:48,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 599.8ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-06-05 14:42:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 779. [2021-06-05 14:42:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.4344473007712084) internal successors, (2672), 778 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2672 transitions. [2021-06-05 14:42:48,890 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2672 transitions. Word has length 20 [2021-06-05 14:42:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:48,890 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2672 transitions. [2021-06-05 14:42:48,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:48,890 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2672 transitions. [2021-06-05 14:42:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:48,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:48,891 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:49,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5711,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:49,091 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:49,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1563484264, now seen corresponding path program 538 times [2021-06-05 14:42:49,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:49,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154387462] [2021-06-05 14:42:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:49,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:49,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154387462] [2021-06-05 14:42:49,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154387462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:49,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302663238] [2021-06-05 14:42:49,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:49,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:49,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:49,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:49,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:49,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302663238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:49,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:49,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:49,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562776781] [2021-06-05 14:42:49,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:49,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:49,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:49,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:49,379 INFO L87 Difference]: Start difference. First operand 779 states and 2672 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:49,722 INFO L93 Difference]: Finished difference Result 1287 states and 4035 transitions. [2021-06-05 14:42:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:49,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:49,724 INFO L225 Difference]: With dead ends: 1287 [2021-06-05 14:42:49,724 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 14:42:49,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 14:42:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 782. [2021-06-05 14:42:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.440460947503201) internal successors, (2687), 781 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:49,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2687 transitions. [2021-06-05 14:42:49,734 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2687 transitions. Word has length 20 [2021-06-05 14:42:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:49,734 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2687 transitions. [2021-06-05 14:42:49,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2687 transitions. [2021-06-05 14:42:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:49,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:49,735 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:49,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5720,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:49,935 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:49,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1548716952, now seen corresponding path program 539 times [2021-06-05 14:42:49,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:49,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153380995] [2021-06-05 14:42:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:50,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:50,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153380995] [2021-06-05 14:42:50,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153380995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:50,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621869757] [2021-06-05 14:42:50,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:50,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:50,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:50,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:50,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:50,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621869757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:50,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:50,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:50,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153302512] [2021-06-05 14:42:50,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:50,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:50,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:50,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:50,215 INFO L87 Difference]: Start difference. First operand 782 states and 2687 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:50,559 INFO L93 Difference]: Finished difference Result 1318 states and 4120 transitions. [2021-06-05 14:42:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:50,561 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 14:42:50,561 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 14:42:50,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 14:42:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 783. [2021-06-05 14:42:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4437340153452687) internal successors, (2693), 782 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2693 transitions. [2021-06-05 14:42:50,571 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2693 transitions. Word has length 20 [2021-06-05 14:42:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:50,571 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2693 transitions. [2021-06-05 14:42:50,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2693 transitions. [2021-06-05 14:42:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:50,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:50,572 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:50,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5724,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:50,772 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:50,773 INFO L82 PathProgramCache]: Analyzing trace with hash 789113388, now seen corresponding path program 540 times [2021-06-05 14:42:50,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:50,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554430201] [2021-06-05 14:42:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:50,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:50,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554430201] [2021-06-05 14:42:50,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554430201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:50,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083979327] [2021-06-05 14:42:50,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:50,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:42:50,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:50,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:51,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083979327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:51,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:51,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:51,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991470590] [2021-06-05 14:42:51,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:51,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:51,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:51,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:51,050 INFO L87 Difference]: Start difference. First operand 783 states and 2693 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:51,412 INFO L93 Difference]: Finished difference Result 1275 states and 4017 transitions. [2021-06-05 14:42:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:51,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:51,414 INFO L225 Difference]: With dead ends: 1275 [2021-06-05 14:42:51,414 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 14:42:51,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 14:42:51,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 779. [2021-06-05 14:42:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.4344473007712084) internal successors, (2672), 778 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2672 transitions. [2021-06-05 14:42:51,424 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2672 transitions. Word has length 20 [2021-06-05 14:42:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:51,424 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2672 transitions. [2021-06-05 14:42:51,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2672 transitions. [2021-06-05 14:42:51,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:51,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:51,425 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:51,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5731,569 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:51,625 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash 389872236, now seen corresponding path program 541 times [2021-06-05 14:42:51,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:51,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428721661] [2021-06-05 14:42:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:51,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:51,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428721661] [2021-06-05 14:42:51,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428721661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:51,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353190504] [2021-06-05 14:42:51,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:51,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:51,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:51,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353190504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:51,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:51,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:51,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097996415] [2021-06-05 14:42:51,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:51,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:51,992 INFO L87 Difference]: Start difference. First operand 779 states and 2672 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:52,817 INFO L93 Difference]: Finished difference Result 1376 states and 4195 transitions. [2021-06-05 14:42:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:52,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:52,819 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 14:42:52,819 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 14:42:52,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 774.8ms TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:42:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 14:42:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 792. [2021-06-05 14:42:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4285714285714284) internal successors, (2712), 791 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2712 transitions. [2021-06-05 14:42:52,837 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2712 transitions. Word has length 20 [2021-06-05 14:42:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:52,837 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2712 transitions. [2021-06-05 14:42:52,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2712 transitions. [2021-06-05 14:42:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:52,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:52,838 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:53,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5737,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:53,038 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:53,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1884284474, now seen corresponding path program 542 times [2021-06-05 14:42:53,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:53,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802316659] [2021-06-05 14:42:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:53,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:53,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802316659] [2021-06-05 14:42:53,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802316659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:53,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775504699] [2021-06-05 14:42:53,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:53,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:53,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:53,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:53,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:53,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775504699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:53,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:53,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:53,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453217572] [2021-06-05 14:42:53,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:53,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:53,317 INFO L87 Difference]: Start difference. First operand 792 states and 2712 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:53,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:53,897 INFO L93 Difference]: Finished difference Result 1535 states and 4603 transitions. [2021-06-05 14:42:53,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:42:53,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:53,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:53,899 INFO L225 Difference]: With dead ends: 1535 [2021-06-05 14:42:53,899 INFO L226 Difference]: Without dead ends: 1535 [2021-06-05 14:42:53,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 475.1ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:42:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-05 14:42:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 793. [2021-06-05 14:42:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4318181818181817) internal successors, (2718), 792 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2718 transitions. [2021-06-05 14:42:53,911 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2718 transitions. Word has length 20 [2021-06-05 14:42:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:53,911 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2718 transitions. [2021-06-05 14:42:53,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2718 transitions. [2021-06-05 14:42:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:53,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:53,912 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:54,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5746 [2021-06-05 14:42:54,112 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:54,113 INFO L82 PathProgramCache]: Analyzing trace with hash 390376752, now seen corresponding path program 543 times [2021-06-05 14:42:54,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:54,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060874264] [2021-06-05 14:42:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:54,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:54,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060874264] [2021-06-05 14:42:54,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060874264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:54,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343694224] [2021-06-05 14:42:54,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:54,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:42:54,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:54,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:54,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:54,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343694224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:54,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:54,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:54,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630519489] [2021-06-05 14:42:54,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:54,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:54,393 INFO L87 Difference]: Start difference. First operand 793 states and 2718 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:54,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:54,666 INFO L93 Difference]: Finished difference Result 1298 states and 4047 transitions. [2021-06-05 14:42:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:54,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:54,668 INFO L225 Difference]: With dead ends: 1298 [2021-06-05 14:42:54,668 INFO L226 Difference]: Without dead ends: 1292 [2021-06-05 14:42:54,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-06-05 14:42:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 802. [2021-06-05 14:42:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.4232209737827715) internal successors, (2742), 801 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2742 transitions. [2021-06-05 14:42:54,679 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2742 transitions. Word has length 20 [2021-06-05 14:42:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:54,679 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2742 transitions. [2021-06-05 14:42:54,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2742 transitions. [2021-06-05 14:42:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:54,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:54,680 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:54,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5754,572 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:54,881 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:54,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1050566082, now seen corresponding path program 544 times [2021-06-05 14:42:54,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:54,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711513840] [2021-06-05 14:42:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:54,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:54,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711513840] [2021-06-05 14:42:54,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711513840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:54,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269533661] [2021-06-05 14:42:54,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:55,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:55,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:55,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:55,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:55,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269533661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:55,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:55,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:55,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730355532] [2021-06-05 14:42:55,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:55,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:55,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:55,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:55,231 INFO L87 Difference]: Start difference. First operand 802 states and 2742 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:55,848 INFO L93 Difference]: Finished difference Result 1326 states and 4108 transitions. [2021-06-05 14:42:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:42:55,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:55,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:55,850 INFO L225 Difference]: With dead ends: 1326 [2021-06-05 14:42:55,850 INFO L226 Difference]: Without dead ends: 1326 [2021-06-05 14:42:55,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:55,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-06-05 14:42:55,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 799. [2021-06-05 14:42:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.426065162907268) internal successors, (2734), 798 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2734 transitions. [2021-06-05 14:42:55,861 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2734 transitions. Word has length 20 [2021-06-05 14:42:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:55,861 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2734 transitions. [2021-06-05 14:42:55,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2734 transitions. [2021-06-05 14:42:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:55,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:55,862 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:56,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 573 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5761 [2021-06-05 14:42:56,062 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:56,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:56,062 INFO L82 PathProgramCache]: Analyzing trace with hash -795264508, now seen corresponding path program 545 times [2021-06-05 14:42:56,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:56,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406146067] [2021-06-05 14:42:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:56,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406146067] [2021-06-05 14:42:56,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406146067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706593210] [2021-06-05 14:42:56,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:56,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:56,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:56,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:56,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:56,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706593210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:56,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:56,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:56,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431751583] [2021-06-05 14:42:56,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:56,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:56,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:56,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:56,396 INFO L87 Difference]: Start difference. First operand 799 states and 2734 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:56,962 INFO L93 Difference]: Finished difference Result 1325 states and 4089 transitions. [2021-06-05 14:42:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:42:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:56,964 INFO L225 Difference]: With dead ends: 1325 [2021-06-05 14:42:56,964 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 14:42:56,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 556.1ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:42:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 14:42:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 803. [2021-06-05 14:42:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.42643391521197) internal successors, (2748), 802 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:56,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2748 transitions. [2021-06-05 14:42:56,975 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2748 transitions. Word has length 20 [2021-06-05 14:42:56,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:56,975 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2748 transitions. [2021-06-05 14:42:56,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:56,975 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2748 transitions. [2021-06-05 14:42:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:56,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:56,976 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:57,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5773 [2021-06-05 14:42:57,176 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:57,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:57,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1572638316, now seen corresponding path program 546 times [2021-06-05 14:42:57,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:57,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883658760] [2021-06-05 14:42:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:57,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:57,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883658760] [2021-06-05 14:42:57,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883658760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:57,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646739881] [2021-06-05 14:42:57,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:57,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:42:57,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:57,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:57,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:57,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646739881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:57,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:57,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:42:57,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777313038] [2021-06-05 14:42:57,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:42:57,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:57,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:42:57,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:42:57,525 INFO L87 Difference]: Start difference. First operand 803 states and 2748 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:58,075 INFO L93 Difference]: Finished difference Result 1347 states and 4164 transitions. [2021-06-05 14:42:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:58,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:58,076 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 14:42:58,076 INFO L226 Difference]: Without dead ends: 1347 [2021-06-05 14:42:58,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 557.2ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-05 14:42:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 801. [2021-06-05 14:42:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.42875) internal successors, (2743), 800 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2743 transitions. [2021-06-05 14:42:58,089 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2743 transitions. Word has length 20 [2021-06-05 14:42:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:58,089 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2743 transitions. [2021-06-05 14:42:58,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2743 transitions. [2021-06-05 14:42:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:58,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:58,090 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:58,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5783 [2021-06-05 14:42:58,291 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:58,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1659282384, now seen corresponding path program 547 times [2021-06-05 14:42:58,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:58,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29356578] [2021-06-05 14:42:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:58,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:58,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29356578] [2021-06-05 14:42:58,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29356578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:58,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814544546] [2021-06-05 14:42:58,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:58,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:58,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814544546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:58,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:58,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:58,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886692084] [2021-06-05 14:42:58,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:58,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:58,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:58,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:58,579 INFO L87 Difference]: Start difference. First operand 801 states and 2743 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:59,076 INFO L93 Difference]: Finished difference Result 1485 states and 4530 transitions. [2021-06-05 14:42:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:42:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:42:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:59,078 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 14:42:59,078 INFO L226 Difference]: Without dead ends: 1485 [2021-06-05 14:42:59,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:42:59,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-06-05 14:42:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 802. [2021-06-05 14:42:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.431960049937578) internal successors, (2749), 801 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2749 transitions. [2021-06-05 14:42:59,090 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2749 transitions. Word has length 20 [2021-06-05 14:42:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:59,090 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2749 transitions. [2021-06-05 14:42:59,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2749 transitions. [2021-06-05 14:42:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:42:59,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:59,091 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:59,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5795 [2021-06-05 14:42:59,292 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:59,292 INFO L82 PathProgramCache]: Analyzing trace with hash -366939984, now seen corresponding path program 548 times [2021-06-05 14:42:59,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:59,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578504120] [2021-06-05 14:42:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:59,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:59,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578504120] [2021-06-05 14:42:59,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578504120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:59,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811171936] [2021-06-05 14:42:59,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:59,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:59,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:59,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:42:59,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:59,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811171936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:59,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:59,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:42:59,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369903418] [2021-06-05 14:42:59,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:42:59,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:59,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:42:59,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:42:59,592 INFO L87 Difference]: Start difference. First operand 802 states and 2749 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:00,048 INFO L93 Difference]: Finished difference Result 1454 states and 4463 transitions. [2021-06-05 14:43:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:43:00,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:00,050 INFO L225 Difference]: With dead ends: 1454 [2021-06-05 14:43:00,050 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 14:43:00,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:00,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 14:43:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 801. [2021-06-05 14:43:00,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.42875) internal successors, (2743), 800 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2743 transitions. [2021-06-05 14:43:00,062 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2743 transitions. Word has length 20 [2021-06-05 14:43:00,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:00,062 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2743 transitions. [2021-06-05 14:43:00,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2743 transitions. [2021-06-05 14:43:00,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:00,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:00,063 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:00,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5802,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:00,263 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:00,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1638545856, now seen corresponding path program 549 times [2021-06-05 14:43:00,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:00,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433584274] [2021-06-05 14:43:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:00,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:00,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433584274] [2021-06-05 14:43:00,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433584274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:00,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775894761] [2021-06-05 14:43:00,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:00,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:00,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:00,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:00,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:00,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775894761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:00,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:00,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:00,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059817775] [2021-06-05 14:43:00,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:00,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:00,541 INFO L87 Difference]: Start difference. First operand 801 states and 2743 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:00,815 INFO L93 Difference]: Finished difference Result 1202 states and 3819 transitions. [2021-06-05 14:43:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:00,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:00,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:00,817 INFO L225 Difference]: With dead ends: 1202 [2021-06-05 14:43:00,817 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 14:43:00,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 14:43:00,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 805. [2021-06-05 14:43:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.4291044776119404) internal successors, (2757), 804 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2757 transitions. [2021-06-05 14:43:00,827 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2757 transitions. Word has length 20 [2021-06-05 14:43:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:00,827 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2757 transitions. [2021-06-05 14:43:00,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2757 transitions. [2021-06-05 14:43:00,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:00,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:00,828 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:01,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:01,028 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:01,029 INFO L82 PathProgramCache]: Analyzing trace with hash 740997514, now seen corresponding path program 550 times [2021-06-05 14:43:01,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:01,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466018354] [2021-06-05 14:43:01,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:01,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:01,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466018354] [2021-06-05 14:43:01,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466018354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:01,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447483622] [2021-06-05 14:43:01,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:01,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:01,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:01,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:01,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447483622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:01,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:01,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:01,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709043132] [2021-06-05 14:43:01,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:01,314 INFO L87 Difference]: Start difference. First operand 805 states and 2757 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:01,939 INFO L93 Difference]: Finished difference Result 1526 states and 4597 transitions. [2021-06-05 14:43:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:43:01,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:01,941 INFO L225 Difference]: With dead ends: 1526 [2021-06-05 14:43:01,941 INFO L226 Difference]: Without dead ends: 1526 [2021-06-05 14:43:01,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:43:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-05 14:43:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 803. [2021-06-05 14:43:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.43142144638404) internal successors, (2752), 802 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2752 transitions. [2021-06-05 14:43:01,952 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2752 transitions. Word has length 20 [2021-06-05 14:43:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:01,953 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2752 transitions. [2021-06-05 14:43:01,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2752 transitions. [2021-06-05 14:43:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:01,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:01,954 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:02,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5818,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:02,154 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:02,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:02,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1142951508, now seen corresponding path program 551 times [2021-06-05 14:43:02,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:02,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689669295] [2021-06-05 14:43:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:02,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:02,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689669295] [2021-06-05 14:43:02,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689669295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:02,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942599783] [2021-06-05 14:43:02,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:02,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:43:02,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:02,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:02,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942599783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:02,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:02,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:43:02,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347977414] [2021-06-05 14:43:02,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:43:02,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:02,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:43:02,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:43:02,508 INFO L87 Difference]: Start difference. First operand 803 states and 2752 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:02,972 INFO L93 Difference]: Finished difference Result 1288 states and 4026 transitions. [2021-06-05 14:43:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:02,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:02,974 INFO L225 Difference]: With dead ends: 1288 [2021-06-05 14:43:02,974 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 14:43:02,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 406.1ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:43:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 14:43:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 800. [2021-06-05 14:43:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.4267834793491865) internal successors, (2738), 799 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2738 transitions. [2021-06-05 14:43:02,985 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2738 transitions. Word has length 20 [2021-06-05 14:43:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:02,985 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2738 transitions. [2021-06-05 14:43:02,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2738 transitions. [2021-06-05 14:43:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:02,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:02,986 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:03,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5826 [2021-06-05 14:43:03,186 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:03,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:03,186 INFO L82 PathProgramCache]: Analyzing trace with hash 481386260, now seen corresponding path program 552 times [2021-06-05 14:43:03,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:03,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435361183] [2021-06-05 14:43:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:03,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:03,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435361183] [2021-06-05 14:43:03,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435361183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:03,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782908141] [2021-06-05 14:43:03,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:03,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:43:03,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:03,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:03,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:03,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782908141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:03,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:03,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:43:03,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906667786] [2021-06-05 14:43:03,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:43:03,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:03,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:43:03,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:43:03,539 INFO L87 Difference]: Start difference. First operand 800 states and 2738 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:04,015 INFO L93 Difference]: Finished difference Result 1278 states and 4000 transitions. [2021-06-05 14:43:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:04,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:04,017 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 14:43:04,017 INFO L226 Difference]: Without dead ends: 1278 [2021-06-05 14:43:04,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:43:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-05 14:43:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 788. [2021-06-05 14:43:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.42566709021601) internal successors, (2696), 787 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2696 transitions. [2021-06-05 14:43:04,028 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2696 transitions. Word has length 20 [2021-06-05 14:43:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:04,028 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2696 transitions. [2021-06-05 14:43:04,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2696 transitions. [2021-06-05 14:43:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:04,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:04,029 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:04,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5843,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:04,229 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:04,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1517456554, now seen corresponding path program 553 times [2021-06-05 14:43:04,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:04,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174869477] [2021-06-05 14:43:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:04,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:04,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174869477] [2021-06-05 14:43:04,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174869477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:04,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388626883] [2021-06-05 14:43:04,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:04,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:04,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:04,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388626883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:04,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:04,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:43:04,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660032396] [2021-06-05 14:43:04,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:43:04,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:04,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:43:04,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:43:04,526 INFO L87 Difference]: Start difference. First operand 788 states and 2696 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:04,890 INFO L93 Difference]: Finished difference Result 1233 states and 3868 transitions. [2021-06-05 14:43:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:04,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:04,892 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 14:43:04,892 INFO L226 Difference]: Without dead ends: 1219 [2021-06-05 14:43:04,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:43:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-06-05 14:43:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 788. [2021-06-05 14:43:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.4231257941550193) internal successors, (2694), 787 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2694 transitions. [2021-06-05 14:43:04,902 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2694 transitions. Word has length 20 [2021-06-05 14:43:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:04,902 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2694 transitions. [2021-06-05 14:43:04,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2694 transitions. [2021-06-05 14:43:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:04,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:04,903 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:05,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:05,103 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1141153918, now seen corresponding path program 554 times [2021-06-05 14:43:05,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:05,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423588899] [2021-06-05 14:43:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:05,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423588899] [2021-06-05 14:43:05,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423588899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728112622] [2021-06-05 14:43:05,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:05,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:05,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:05,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:05,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:05,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728112622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:05,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:05,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:43:05,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014365476] [2021-06-05 14:43:05,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:43:05,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:05,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:43:05,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:43:05,403 INFO L87 Difference]: Start difference. First operand 788 states and 2694 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:05,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:05,752 INFO L93 Difference]: Finished difference Result 1311 states and 4044 transitions. [2021-06-05 14:43:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:05,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:05,754 INFO L225 Difference]: With dead ends: 1311 [2021-06-05 14:43:05,754 INFO L226 Difference]: Without dead ends: 1311 [2021-06-05 14:43:05,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:43:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-06-05 14:43:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 784. [2021-06-05 14:43:05,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.422733077905492) internal successors, (2680), 783 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2680 transitions. [2021-06-05 14:43:05,772 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2680 transitions. Word has length 20 [2021-06-05 14:43:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:05,772 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2680 transitions. [2021-06-05 14:43:05,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2680 transitions. [2021-06-05 14:43:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:05,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:05,773 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:05,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5859 [2021-06-05 14:43:05,974 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 290550556, now seen corresponding path program 555 times [2021-06-05 14:43:05,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:05,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397597119] [2021-06-05 14:43:05,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:06,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:06,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397597119] [2021-06-05 14:43:06,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397597119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:06,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034525905] [2021-06-05 14:43:06,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:06,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:43:06,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:06,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034525905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:06,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:06,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893692134] [2021-06-05 14:43:06,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:06,235 INFO L87 Difference]: Start difference. First operand 784 states and 2680 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:06,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:06,460 INFO L93 Difference]: Finished difference Result 1235 states and 3915 transitions. [2021-06-05 14:43:06,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:06,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:06,462 INFO L225 Difference]: With dead ends: 1235 [2021-06-05 14:43:06,462 INFO L226 Difference]: Without dead ends: 1235 [2021-06-05 14:43:06,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:43:06,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-06-05 14:43:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 782. [2021-06-05 14:43:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.4199743918053778) internal successors, (2671), 781 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2671 transitions. [2021-06-05 14:43:06,472 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2671 transitions. Word has length 20 [2021-06-05 14:43:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:06,472 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2671 transitions. [2021-06-05 14:43:06,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2671 transitions. [2021-06-05 14:43:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:06,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:06,473 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:06,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5865,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:06,674 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:06,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1473316636, now seen corresponding path program 556 times [2021-06-05 14:43:06,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:06,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013414469] [2021-06-05 14:43:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:06,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013414469] [2021-06-05 14:43:06,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013414469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599299069] [2021-06-05 14:43:06,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:06,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:06,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:06,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:06,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599299069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:06,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:06,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:06,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039063950] [2021-06-05 14:43:06,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:06,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:06,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:06,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:06,949 INFO L87 Difference]: Start difference. First operand 782 states and 2671 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:07,328 INFO L93 Difference]: Finished difference Result 1264 states and 3978 transitions. [2021-06-05 14:43:07,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:07,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:07,330 INFO L225 Difference]: With dead ends: 1264 [2021-06-05 14:43:07,330 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 14:43:07,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:43:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 14:43:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 779. [2021-06-05 14:43:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.4151670951156814) internal successors, (2657), 778 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2657 transitions. [2021-06-05 14:43:07,340 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2657 transitions. Word has length 20 [2021-06-05 14:43:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:07,340 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2657 transitions. [2021-06-05 14:43:07,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2657 transitions. [2021-06-05 14:43:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:07,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:07,341 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:07,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5869 [2021-06-05 14:43:07,541 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:07,542 INFO L82 PathProgramCache]: Analyzing trace with hash -483820320, now seen corresponding path program 557 times [2021-06-05 14:43:07,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:07,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853656518] [2021-06-05 14:43:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:07,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:07,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853656518] [2021-06-05 14:43:07,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853656518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:07,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228880451] [2021-06-05 14:43:07,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:07,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:07,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:07,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:07,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:07,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228880451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:07,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:07,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:07,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799675799] [2021-06-05 14:43:07,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:07,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:07,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:07,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:07,815 INFO L87 Difference]: Start difference. First operand 779 states and 2657 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:08,036 INFO L93 Difference]: Finished difference Result 1221 states and 3881 transitions. [2021-06-05 14:43:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:08,038 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 14:43:08,038 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 14:43:08,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:43:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 14:43:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 767. [2021-06-05 14:43:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.412532637075718) internal successors, (2614), 766 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2614 transitions. [2021-06-05 14:43:08,049 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2614 transitions. Word has length 20 [2021-06-05 14:43:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:08,050 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2614 transitions. [2021-06-05 14:43:08,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2614 transitions. [2021-06-05 14:43:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:08,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:08,051 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:08,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5874,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:08,251 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:08,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1133715308, now seen corresponding path program 558 times [2021-06-05 14:43:08,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:08,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694000844] [2021-06-05 14:43:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:08,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694000844] [2021-06-05 14:43:08,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694000844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443764954] [2021-06-05 14:43:08,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:08,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:43:08,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:08,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:08,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:08,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:08,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:08,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:08,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:08,507 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:43:08,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:08,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:43:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:08,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443764954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:08,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:08,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:43:08,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556199248] [2021-06-05 14:43:08,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:43:08,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:08,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:43:08,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:43:08,537 INFO L87 Difference]: Start difference. First operand 767 states and 2614 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:08,790 INFO L93 Difference]: Finished difference Result 1329 states and 4168 transitions. [2021-06-05 14:43:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:08,790 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:08,791 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 14:43:08,791 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 14:43:08,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 14:43:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 771. [2021-06-05 14:43:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.418181818181818) internal successors, (2632), 770 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2632 transitions. [2021-06-05 14:43:08,802 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2632 transitions. Word has length 20 [2021-06-05 14:43:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:08,802 INFO L482 AbstractCegarLoop]: Abstraction has 771 states and 2632 transitions. [2021-06-05 14:43:08,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2632 transitions. [2021-06-05 14:43:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:08,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:08,803 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:09,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5879 [2021-06-05 14:43:09,003 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:09,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:09,004 INFO L82 PathProgramCache]: Analyzing trace with hash -823421648, now seen corresponding path program 559 times [2021-06-05 14:43:09,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:09,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850078834] [2021-06-05 14:43:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:09,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:09,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850078834] [2021-06-05 14:43:09,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850078834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:09,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089314817] [2021-06-05 14:43:09,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:09,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:09,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:09,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:09,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,251 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:43:09,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:09,251 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:43:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:09,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089314817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:09,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:09,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:43:09,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952136025] [2021-06-05 14:43:09,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:43:09,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:09,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:43:09,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:43:09,280 INFO L87 Difference]: Start difference. First operand 771 states and 2632 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:09,517 INFO L93 Difference]: Finished difference Result 1331 states and 4172 transitions. [2021-06-05 14:43:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:09,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:09,518 INFO L225 Difference]: With dead ends: 1331 [2021-06-05 14:43:09,518 INFO L226 Difference]: Without dead ends: 1331 [2021-06-05 14:43:09,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-06-05 14:43:09,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 770. [2021-06-05 14:43:09,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.4148244473342) internal successors, (2626), 769 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2626 transitions. [2021-06-05 14:43:09,536 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2626 transitions. Word has length 20 [2021-06-05 14:43:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:09,536 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2626 transitions. [2021-06-05 14:43:09,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2626 transitions. [2021-06-05 14:43:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:09,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:09,537 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:09,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5885,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:09,738 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:09,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:09,738 INFO L82 PathProgramCache]: Analyzing trace with hash 790145086, now seen corresponding path program 560 times [2021-06-05 14:43:09,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:09,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466367036] [2021-06-05 14:43:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:09,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:09,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466367036] [2021-06-05 14:43:09,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466367036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:09,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005175722] [2021-06-05 14:43:09,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:09,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:09,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:09,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:09,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:09,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:09,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,993 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 14:43:09,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:43:09,994 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 14:43:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:10,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005175722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:10,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:10,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:10,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316346414] [2021-06-05 14:43:10,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:10,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:10,030 INFO L87 Difference]: Start difference. First operand 770 states and 2626 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:10,295 INFO L93 Difference]: Finished difference Result 1280 states and 4035 transitions. [2021-06-05 14:43:10,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:43:10,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:10,297 INFO L225 Difference]: With dead ends: 1280 [2021-06-05 14:43:10,297 INFO L226 Difference]: Without dead ends: 1280 [2021-06-05 14:43:10,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:43:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-06-05 14:43:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 764. [2021-06-05 14:43:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.4102228047182175) internal successors, (2602), 763 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2602 transitions. [2021-06-05 14:43:10,307 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2602 transitions. Word has length 20 [2021-06-05 14:43:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:10,307 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2602 transitions. [2021-06-05 14:43:10,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2602 transitions. [2021-06-05 14:43:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:10,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:10,308 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:10,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5891 [2021-06-05 14:43:10,508 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:10,509 INFO L82 PathProgramCache]: Analyzing trace with hash -237271706, now seen corresponding path program 561 times [2021-06-05 14:43:10,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:10,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641835458] [2021-06-05 14:43:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:10,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:10,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641835458] [2021-06-05 14:43:10,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641835458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:10,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453660889] [2021-06-05 14:43:10,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:10,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:43:10,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:10,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:10,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:10,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:10,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:10,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,769 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 14:43:10,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:10,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:10,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:10,781 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 14:43:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:10,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453660889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:10,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:10,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:10,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954273267] [2021-06-05 14:43:10,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:10,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:10,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:10,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:10,857 INFO L87 Difference]: Start difference. First operand 764 states and 2602 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:11,447 INFO L93 Difference]: Finished difference Result 1593 states and 4768 transitions. [2021-06-05 14:43:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:43:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:11,450 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 14:43:11,450 INFO L226 Difference]: Without dead ends: 1593 [2021-06-05 14:43:11,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:43:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-06-05 14:43:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 769. [2021-06-05 14:43:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.4205729166666665) internal successors, (2627), 768 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2627 transitions. [2021-06-05 14:43:11,462 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2627 transitions. Word has length 20 [2021-06-05 14:43:11,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:11,462 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2627 transitions. [2021-06-05 14:43:11,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:11,462 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2627 transitions. [2021-06-05 14:43:11,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:11,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:11,463 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:11,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5897 [2021-06-05 14:43:11,663 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:11,663 INFO L82 PathProgramCache]: Analyzing trace with hash -548917864, now seen corresponding path program 562 times [2021-06-05 14:43:11,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:11,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154310988] [2021-06-05 14:43:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:11,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:11,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154310988] [2021-06-05 14:43:11,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154310988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:11,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404719354] [2021-06-05 14:43:11,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:11,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:11,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:11,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:11,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:11,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:11,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:11,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:11,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:11,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:11,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:11,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:11,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:11,979 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 14:43:11,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:11,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:12,003 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 14:43:12,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:12,004 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:91, output treesize:20 [2021-06-05 14:43:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:12,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404719354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:12,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:12,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:43:12,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131040527] [2021-06-05 14:43:12,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:43:12,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:12,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:43:12,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:43:12,066 INFO L87 Difference]: Start difference. First operand 769 states and 2627 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:12,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:12,680 INFO L93 Difference]: Finished difference Result 1472 states and 4481 transitions. [2021-06-05 14:43:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:12,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:12,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:12,682 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 14:43:12,682 INFO L226 Difference]: Without dead ends: 1472 [2021-06-05 14:43:12,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 572.6ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-06-05 14:43:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 773. [2021-06-05 14:43:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.428756476683938) internal successors, (2647), 772 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2647 transitions. [2021-06-05 14:43:12,693 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2647 transitions. Word has length 20 [2021-06-05 14:43:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:12,693 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2647 transitions. [2021-06-05 14:43:12,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2647 transitions. [2021-06-05 14:43:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:12,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:12,694 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:12,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5910,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:12,894 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:12,894 INFO L82 PathProgramCache]: Analyzing trace with hash 514128732, now seen corresponding path program 563 times [2021-06-05 14:43:12,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:12,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447087285] [2021-06-05 14:43:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:12,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:12,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447087285] [2021-06-05 14:43:12,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447087285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:12,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482117904] [2021-06-05 14:43:12,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:13,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:13,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:13,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:13,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:13,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:13,177 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-06-05 14:43:13,177 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-06-05 14:43:13,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:13,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:13,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:13,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:13,203 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 14:43:13,203 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 14:43:13,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:13,204 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 14:43:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:13,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482117904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:13,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:13,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:13,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761712523] [2021-06-05 14:43:13,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:13,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:13,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:13,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:13,270 INFO L87 Difference]: Start difference. First operand 773 states and 2647 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:13,755 INFO L93 Difference]: Finished difference Result 1600 states and 4830 transitions. [2021-06-05 14:43:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:43:13,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:13,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:13,757 INFO L225 Difference]: With dead ends: 1600 [2021-06-05 14:43:13,757 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 14:43:13,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 14:43:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 774. [2021-06-05 14:43:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.4320827943078913) internal successors, (2653), 773 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2653 transitions. [2021-06-05 14:43:13,768 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2653 transitions. Word has length 20 [2021-06-05 14:43:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:13,768 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2653 transitions. [2021-06-05 14:43:13,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2653 transitions. [2021-06-05 14:43:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:13,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:13,769 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:13,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5923 [2021-06-05 14:43:13,969 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:13,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1806471132, now seen corresponding path program 564 times [2021-06-05 14:43:13,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:13,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644705892] [2021-06-05 14:43:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:14,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:14,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644705892] [2021-06-05 14:43:14,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644705892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:14,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061663930] [2021-06-05 14:43:14,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:14,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:43:14,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:14,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:14,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:14,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:14,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:14,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:14,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:14,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:14,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:14,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:14,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:14,240 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:43:14,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:14,241 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:43:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:14,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061663930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:14,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:14,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:14,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193150553] [2021-06-05 14:43:14,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:14,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:14,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:14,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:14,330 INFO L87 Difference]: Start difference. First operand 774 states and 2653 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:14,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:14,808 INFO L93 Difference]: Finished difference Result 1569 states and 4763 transitions. [2021-06-05 14:43:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:43:14,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:14,810 INFO L225 Difference]: With dead ends: 1569 [2021-06-05 14:43:14,810 INFO L226 Difference]: Without dead ends: 1569 [2021-06-05 14:43:14,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-06-05 14:43:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 773. [2021-06-05 14:43:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.428756476683938) internal successors, (2647), 772 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2647 transitions. [2021-06-05 14:43:14,822 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2647 transitions. Word has length 20 [2021-06-05 14:43:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:14,822 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2647 transitions. [2021-06-05 14:43:14,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2647 transitions. [2021-06-05 14:43:14,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:14,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:14,823 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:15,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5934,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:15,023 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:15,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:15,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1380558666, now seen corresponding path program 565 times [2021-06-05 14:43:15,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:15,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665865608] [2021-06-05 14:43:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:15,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665865608] [2021-06-05 14:43:15,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665865608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484414548] [2021-06-05 14:43:15,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:15,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:15,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:15,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:15,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,291 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 14:43:15,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:15,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:15,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:15,317 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 14:43:15,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:15,318 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 14:43:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:15,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484414548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:15,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:15,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:15,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388789302] [2021-06-05 14:43:15,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:15,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:15,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:15,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:15,388 INFO L87 Difference]: Start difference. First operand 773 states and 2647 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:16,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:16,322 INFO L93 Difference]: Finished difference Result 1860 states and 5396 transitions. [2021-06-05 14:43:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:43:16,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:16,324 INFO L225 Difference]: With dead ends: 1860 [2021-06-05 14:43:16,324 INFO L226 Difference]: Without dead ends: 1860 [2021-06-05 14:43:16,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 860.3ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:43:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-06-05 14:43:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 773. [2021-06-05 14:43:16,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.433937823834197) internal successors, (2651), 772 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2651 transitions. [2021-06-05 14:43:16,337 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2651 transitions. Word has length 20 [2021-06-05 14:43:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:16,337 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2651 transitions. [2021-06-05 14:43:16,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2651 transitions. [2021-06-05 14:43:16,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:16,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:16,338 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:16,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5944,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:16,539 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1640169920, now seen corresponding path program 566 times [2021-06-05 14:43:16,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:16,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007761072] [2021-06-05 14:43:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:16,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:16,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007761072] [2021-06-05 14:43:16,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007761072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:16,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530628414] [2021-06-05 14:43:16,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:16,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:16,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:16,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:16,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:16,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:16,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:16,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,851 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 14:43:16,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:16,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:16,875 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 14:43:16,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:16,876 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 14:43:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:16,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530628414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:16,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:16,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:43:16,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889695020] [2021-06-05 14:43:16,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:43:16,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:16,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:43:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:43:16,944 INFO L87 Difference]: Start difference. First operand 773 states and 2651 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:17,489 INFO L93 Difference]: Finished difference Result 1423 states and 4404 transitions. [2021-06-05 14:43:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:17,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:17,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:17,491 INFO L225 Difference]: With dead ends: 1423 [2021-06-05 14:43:17,491 INFO L226 Difference]: Without dead ends: 1423 [2021-06-05 14:43:17,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 529.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-06-05 14:43:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 772. [2021-06-05 14:43:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.430609597924773) internal successors, (2645), 771 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2645 transitions. [2021-06-05 14:43:17,501 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2645 transitions. Word has length 20 [2021-06-05 14:43:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:17,502 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2645 transitions. [2021-06-05 14:43:17,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:17,502 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2645 transitions. [2021-06-05 14:43:17,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:17,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:17,503 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:17,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5958 [2021-06-05 14:43:17,703 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash -734282022, now seen corresponding path program 567 times [2021-06-05 14:43:17,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:17,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399918477] [2021-06-05 14:43:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:17,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:17,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399918477] [2021-06-05 14:43:17,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399918477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:17,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122255254] [2021-06-05 14:43:17,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:17,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:43:17,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:17,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:17,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:17,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:17,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:17,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:18,012 INFO L628 ElimStorePlain]: treesize reduction 14, result has 65.9 percent of original size [2021-06-05 14:43:18,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:18,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:18,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:18,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:18,028 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:66, output treesize:20 [2021-06-05 14:43:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:18,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122255254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:18,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:18,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:18,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110813403] [2021-06-05 14:43:18,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:18,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:18,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:18,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:18,080 INFO L87 Difference]: Start difference. First operand 772 states and 2645 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:18,442 INFO L93 Difference]: Finished difference Result 1390 states and 4297 transitions. [2021-06-05 14:43:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:43:18,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:18,444 INFO L225 Difference]: With dead ends: 1390 [2021-06-05 14:43:18,444 INFO L226 Difference]: Without dead ends: 1383 [2021-06-05 14:43:18,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:43:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-06-05 14:43:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 787. [2021-06-05 14:43:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.4173027989821882) internal successors, (2686), 786 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2686 transitions. [2021-06-05 14:43:18,455 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2686 transitions. Word has length 20 [2021-06-05 14:43:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:18,455 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2686 transitions. [2021-06-05 14:43:18,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2686 transitions. [2021-06-05 14:43:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:18,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:18,456 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:18,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5970 [2021-06-05 14:43:18,657 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1633620802, now seen corresponding path program 568 times [2021-06-05 14:43:18,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:18,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679166390] [2021-06-05 14:43:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:18,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:18,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679166390] [2021-06-05 14:43:18,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679166390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:18,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846318842] [2021-06-05 14:43:18,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:18,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:18,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:18,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:18,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:18,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:18,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:18,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:18,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:18,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:18,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,001 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 14:43:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:19,004 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:19,024 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 14:43:19,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:19,025 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 14:43:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:19,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846318842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:19,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:19,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:19,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929999556] [2021-06-05 14:43:19,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:19,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:19,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:19,068 INFO L87 Difference]: Start difference. First operand 787 states and 2686 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:19,631 INFO L93 Difference]: Finished difference Result 1471 states and 4494 transitions. [2021-06-05 14:43:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:19,633 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 14:43:19,633 INFO L226 Difference]: Without dead ends: 1471 [2021-06-05 14:43:19,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 479.0ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-06-05 14:43:19,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 785. [2021-06-05 14:43:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.419642857142857) internal successors, (2681), 784 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:19,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2681 transitions. [2021-06-05 14:43:19,644 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2681 transitions. Word has length 20 [2021-06-05 14:43:19,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:19,644 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2681 transitions. [2021-06-05 14:43:19,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2681 transitions. [2021-06-05 14:43:19,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:19,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:19,645 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:19,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5986 [2021-06-05 14:43:19,846 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:19,846 INFO L82 PathProgramCache]: Analyzing trace with hash -888519192, now seen corresponding path program 569 times [2021-06-05 14:43:19,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:19,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795452636] [2021-06-05 14:43:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:19,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:19,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795452636] [2021-06-05 14:43:19,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795452636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:19,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394143709] [2021-06-05 14:43:19,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:20,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:20,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:20,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:20,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:20,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:20,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:20,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:20,225 INFO L628 ElimStorePlain]: treesize reduction 21, result has 65.6 percent of original size [2021-06-05 14:43:20,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-06-05 14:43:20,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:20,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:20,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:20,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:20,253 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 14:43:20,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:20,253 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-05 14:43:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:20,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394143709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:20,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:20,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:43:20,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235967780] [2021-06-05 14:43:20,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:43:20,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:20,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:43:20,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:43:20,291 INFO L87 Difference]: Start difference. First operand 785 states and 2681 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:20,613 INFO L93 Difference]: Finished difference Result 1418 states and 4385 transitions. [2021-06-05 14:43:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:20,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:20,615 INFO L225 Difference]: With dead ends: 1418 [2021-06-05 14:43:20,615 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 14:43:20,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:43:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 14:43:20,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 783. [2021-06-05 14:43:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.421994884910486) internal successors, (2676), 782 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2676 transitions. [2021-06-05 14:43:20,626 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2676 transitions. Word has length 20 [2021-06-05 14:43:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:20,626 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2676 transitions. [2021-06-05 14:43:20,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:20,626 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2676 transitions. [2021-06-05 14:43:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:20,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:20,627 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:20,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5999,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:20,827 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:20,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:20,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2020785624, now seen corresponding path program 570 times [2021-06-05 14:43:20,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:20,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912881385] [2021-06-05 14:43:20,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:20,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:20,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912881385] [2021-06-05 14:43:20,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912881385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:20,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439924699] [2021-06-05 14:43:20,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:21,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:43:21,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:21,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:21,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:21,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:21,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:21,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:21,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:21,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:21,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:21,084 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 14:43:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:21,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:21,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:21,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:21,096 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 14:43:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:21,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439924699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:21,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:21,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:21,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792229784] [2021-06-05 14:43:21,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:21,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:21,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:21,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:21,166 INFO L87 Difference]: Start difference. First operand 783 states and 2676 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:21,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:21,514 INFO L93 Difference]: Finished difference Result 1490 states and 4597 transitions. [2021-06-05 14:43:21,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:21,514 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:21,516 INFO L225 Difference]: With dead ends: 1490 [2021-06-05 14:43:21,516 INFO L226 Difference]: Without dead ends: 1490 [2021-06-05 14:43:21,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-05 14:43:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 782. [2021-06-05 14:43:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.41741357234315) internal successors, (2669), 781 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2669 transitions. [2021-06-05 14:43:21,527 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2669 transitions. Word has length 20 [2021-06-05 14:43:21,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:21,527 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2669 transitions. [2021-06-05 14:43:21,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2669 transitions. [2021-06-05 14:43:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:21,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:21,528 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:21,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6012 [2021-06-05 14:43:21,729 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash -728443224, now seen corresponding path program 571 times [2021-06-05 14:43:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:21,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764780156] [2021-06-05 14:43:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:21,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764780156] [2021-06-05 14:43:21,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764780156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016244033] [2021-06-05 14:43:21,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:21,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:21,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-06-05 14:43:21,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:21,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:21,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,000 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 14:43:22,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:22,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:22,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:22,011 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 14:43:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:22,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016244033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:22,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:22,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:22,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447263497] [2021-06-05 14:43:22,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:22,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:22,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:22,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:22,074 INFO L87 Difference]: Start difference. First operand 782 states and 2669 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:22,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:22,409 INFO L93 Difference]: Finished difference Result 1490 states and 4592 transitions. [2021-06-05 14:43:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:43:22,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:22,411 INFO L225 Difference]: With dead ends: 1490 [2021-06-05 14:43:22,411 INFO L226 Difference]: Without dead ends: 1490 [2021-06-05 14:43:22,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-05 14:43:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 779. [2021-06-05 14:43:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.411311053984576) internal successors, (2654), 778 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2654 transitions. [2021-06-05 14:43:22,422 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2654 transitions. Word has length 20 [2021-06-05 14:43:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:22,423 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2654 transitions. [2021-06-05 14:43:22,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2654 transitions. [2021-06-05 14:43:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:22,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:22,424 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:22,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6025 [2021-06-05 14:43:22,624 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:22,624 INFO L82 PathProgramCache]: Analyzing trace with hash -687771078, now seen corresponding path program 572 times [2021-06-05 14:43:22,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:22,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881299052] [2021-06-05 14:43:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:22,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:22,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881299052] [2021-06-05 14:43:22,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881299052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:22,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379082992] [2021-06-05 14:43:22,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:22,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:22,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:22,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:22,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:22,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:22,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:22,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,897 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 14:43:22,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:22,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:22,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:22,920 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:43:22,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:22,921 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 14:43:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:22,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379082992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:22,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:22,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:43:22,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530729675] [2021-06-05 14:43:22,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:43:22,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:22,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:43:22,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:43:22,973 INFO L87 Difference]: Start difference. First operand 779 states and 2654 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:23,374 INFO L93 Difference]: Finished difference Result 1461 states and 4526 transitions. [2021-06-05 14:43:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:43:23,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:43:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:23,376 INFO L225 Difference]: With dead ends: 1461 [2021-06-05 14:43:23,376 INFO L226 Difference]: Without dead ends: 1461 [2021-06-05 14:43:23,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-06-05 14:43:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 776. [2021-06-05 14:43:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.4090322580645163) internal successors, (2642), 775 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2642 transitions. [2021-06-05 14:43:23,387 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2642 transitions. Word has length 20 [2021-06-05 14:43:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:23,387 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2642 transitions. [2021-06-05 14:43:23,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2642 transitions. [2021-06-05 14:43:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:43:23,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:23,388 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:23,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6036 [2021-06-05 14:43:23,589 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:23,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1027461022, now seen corresponding path program 573 times [2021-06-05 14:43:23,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:23,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166531407] [2021-06-05 14:43:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:23,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:23,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166531407] [2021-06-05 14:43:23,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166531407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:23,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929103661] [2021-06-05 14:43:23,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:23,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:23,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:43:23,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:23,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 14:43:23,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:43:23,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,862 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 14:43:23,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:43:23,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:23,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:23,887 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:43:23,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:23,887 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 14:43:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:23,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929103661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:23,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:23,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:43:23,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257727445] [2021-06-05 14:43:23,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:43:23,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:43:23,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:43:23,930 INFO L87 Difference]: Start difference. First operand 776 states and 2642 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 14:43:24,025 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-06-05 14:43:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:43:24,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6049,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:24,225 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:43:24,227 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:43:24,228 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:43:24,228 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:43:24 BasicIcfg [2021-06-05 14:43:24,229 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:43:24,229 INFO L168 Benchmark]: Toolchain (without parser) took 792587.47 ms. Allocated memory was 331.4 MB in the beginning and 478.2 MB in the end (delta: 146.8 MB). Free memory was 310.4 MB in the beginning and 389.2 MB in the end (delta: -78.8 MB). Peak memory consumption was 70.8 MB. Max. memory is 16.0 GB. [2021-06-05 14:43:24,229 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 331.4 MB. Free memory is still 311.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:43:24,229 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.61 ms. Allocated memory is still 331.4 MB. Free memory was 310.3 MB in the beginning and 308.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:43:24,229 INFO L168 Benchmark]: Boogie Preprocessor took 31.42 ms. Allocated memory is still 331.4 MB. Free memory was 308.9 MB in the beginning and 307.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:43:24,229 INFO L168 Benchmark]: RCFGBuilder took 597.10 ms. Allocated memory is still 331.4 MB. Free memory was 307.7 MB in the beginning and 300.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.0 GB. [2021-06-05 14:43:24,229 INFO L168 Benchmark]: TraceAbstraction took 791930.00 ms. Allocated memory was 331.4 MB in the beginning and 478.2 MB in the end (delta: 146.8 MB). Free memory was 300.8 MB in the beginning and 389.2 MB in the end (delta: -88.5 MB). Peak memory consumption was 59.4 MB. Max. memory is 16.0 GB. [2021-06-05 14:43:24,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 331.4 MB. Free memory is still 311.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.61 ms. Allocated memory is still 331.4 MB. Free memory was 310.3 MB in the beginning and 308.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 31.42 ms. Allocated memory is still 331.4 MB. Free memory was 308.9 MB in the beginning and 307.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 597.10 ms. Allocated memory is still 331.4 MB. Free memory was 307.7 MB in the beginning and 300.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 791930.00 ms. Allocated memory was 331.4 MB in the beginning and 478.2 MB in the end (delta: 146.8 MB). Free memory was 300.8 MB in the beginning and 389.2 MB in the end (delta: -88.5 MB). Peak memory consumption was 59.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (776states) and FLOYD_HOARE automaton (currently 8 states, 12 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 33 for 8ms.. - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (776states) and FLOYD_HOARE automaton (currently 8 states, 12 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 33 for 8ms.. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (776states) and FLOYD_HOARE automaton (currently 8 states, 12 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 33 for 8ms.. - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (776states) and FLOYD_HOARE automaton (currently 8 states, 12 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 33 for 8ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 791860.0ms, OverallIterations: 740, TraceHistogramMax: 2, EmptinessCheckTime: 604.1ms, AutomataDifference: 416451.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38613 SDtfs, 97112 SDslu, 218706 SDs, 0 SdLazy, 242412 SolverSat, 9689 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 95363.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24758 GetRequests, 10107 SyntacticMatches, 179 SemanticMatches, 14471 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49348 ImplicationChecksByTransitivity, 416438.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=453, InterpolantAutomatonStates: 8752, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6505.5ms AutomataMinimizationTime, 739 MinimizatonAttempts, 239472 StatesRemovedByMinimization, 739 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3120.5ms SsaConstructionTime, 6877.0ms SatisfiabilityAnalysisTime, 192418.1ms InterpolantComputationTime, 26058 NumberOfCodeBlocks, 26058 NumberOfCodeBlocksAsserted, 1861 NumberOfCheckSat, 24717 ConstructedInterpolants, 0 QuantifiedInterpolants, 287713 SizeOfPredicates, 6017 NumberOfNonLiveVariables, 51840 ConjunctsInSsa, 13694 ConjunctsInUnsatCore, 1341 InterpolantComputations, 155 PerfectInterpolantSequences, 1418/4065 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown